@article {2082, title = {Powder neutron diffraction determination of the structure of the o-xylene/zeolite ZSM-5 complex}, journal = {Microporous and Mesoporous Materials}, volume = {112}, number = {1-3}, year = {2008}, note = {ISI Document Delivery No.: 313AKTimes Cited: 1Cited Reference Count: 41Fyfe, Colin A. Lee, J. S. Joseph Cranswick, Lachlan M. D. Swainson, Ian}, month = {Jul}, pages = {299-307}, type = {Article}, abstract = {The structure of the complex of zeolite ZSM-5 (MFI) and ortho-xylene at a loading of four molecules per u.c. has been solved using powder neutron diffraction techniques and perdeuterated xylene. The structure is orthorhombic and the position and orientation of the organic is identical to that found previously by solid state NMR, attesting to the reliability of the NMR technique as a complement to diffraction methods. The maximum and minimum oxygen-oxygen distances of the elliptical 10-membered ring where the ortho-xylene is located are 8.86 angstrom and 7.45 angstrom, respectively, compared to corresponding distances of 9.13 angstrom and 7.32 angstrom found previously for the para-isomer, reflecting the different adjustments of the framework to the different sizes and shapes of the two guest molecules. (C) 2007 Elsevier Inc. All rights reserved.}, keywords = {CRYSTAL, FLUORIDE IONS, FRAMEWORK, HOST, LOCATION, method, MFI zeolite, NMR, ortho-xylene, PARA-XYLENE, powder neutron diffraction, SORBATE, X-RAY-DIFFRACTION, ZEOLITE ZSM-5}, isbn = {1387-1811}, url = {://000256713300034}, author = {Fyfe, C. A. and Lee, J. S. J. and Cranswick, L. M. D. and Swainson, I.} } @article {1240, title = {Coordination chemistry of P,O-bidentate phosphinophenolates with Ga3+ and In3+}, journal = {Dalton Transactions}, number = {13}, year = {2005}, note = {ISI Document Delivery No.: 936NJTimes Cited: 4Cited Reference Count: 63}, pages = {2268-2274}, type = {Article}, abstract = {Novel complexes of Ga3+ and In3+ were synthesized with two hetero donor phosphinophenolate ligands (PO-, ortho-phenoxydiphenylphosphine; MePO-, 5-methyl-2-phenoxydiphenylphosphine). RPO- (R = H, Me) binds in a bidentate fashion through both the hard O and the soft P donor atoms to In3+, whereas, it only binds Ga3+ through the O donor. Electrochemical synthesis proved to be a practical synthetic approach to In-2(PO)(3)Cl-3, In(PO)(3) and In(MePO)(3). [In(MePO)(H2O)Cl-2](2) and Ga(HPO)Cl-3 were synthesized from MCl3 (M = In and Ga, respectively). Both dimetallic indium complexes, [In(MePO)(H2O)Cl-2](2) and In-2(PO)(3)Cl-3, incorporate phenolate oxygen atoms bridging the two metal ions. Each pair of In atoms are in a distorted octahedral geometry in each complex, with the former complex having a coordination sphere of PO3Cl2 for both indium metal ions and the latter showing a coordination sphere of PO3Cl2 for one indium and P2O3Cl for the other. Ga(HPO)Cl-3 is a zwitterionic complex, with Ga having a OCl3 coordination core. All these complexes were fully characterized by a variety of techniques including X-ray crystallography.}, keywords = {aluminum, CRYSTAL, DERIVATIVES, gallium, INDIUM TRICHLORIDE, LIGANDS, METAL CHELATE COMPLEXES, MOLECULAR-STRUCTURE, phosphine, THALLIUM}, isbn = {1477-9226}, url = {://000229862400008}, author = {Saatchi, K. and Patrick, B. O. and Orvig, Chris} } @article {1296, title = {Dynamic C-13 NMR studies of ligand exchange in linear (d(10)) silver(I) and gold(I) and square-planar (d(8)) rhodium(I) homoleptic metal carbonyl cations in superacidic media}, journal = {Magnetic Resonance in Chemistry}, volume = {43}, number = {7}, year = {2005}, note = {ISI Document Delivery No.: 936FUTimes Cited: 0Cited Reference Count: 21}, month = {Jul}, pages = {520-527}, type = {Article}, abstract = {The dynamic CO exchange of the monovalent metal carbonyl cations [Ag((CO)-C-13)](+), [Au((CO)-C-13)(2)](+)-Au((CO)-C-13) SO3F and [Rh((CO)-C-12)(4-x)((CO)-C-13)(x)](+) (x <= 1) in superacidic solutions was studied by variable-temperature C-13 NMR methods. The exchange rates are strongly dependent on the acidity of the solvent, the concentration of metal carbonyl cations and temperature. Whereas a suitable exchange rate of the Ag(I) system is only accessible in magic acid (HSO3F-SbF5), the more stable Au(I) and Rh(I) systems were studied in the less acidic fluorosulfuric acid. Selected solutions of Ag(I), Rh(I) and Au(I) yielded activation barriers Delta G* of 42.7, 43.5, and 56.2 kJ mol(-1) respectively. Copyright (c) 2005 John Wiley \& Sons, Ltd.}, keywords = {C-13 NMR, CO exchange, CRYSTAL, dynamic NMR, fluorosulfuric acid, GOLD, HINDERED INTERNAL ROTATION, HSO3F-SBF5, magic acid, metal carbonyl cations, NMR, NUCLEAR-MAGNETIC-RESONANCE, rhodium, silver, UNDECAFLUORODIANTIMONATE(V), VIBRATIONAL-SPECTRA}, isbn = {0749-1581}, url = {://000229841700003}, author = {von Ahsen, B. and Bach, C. and Balzer, G. and Bley, B. and Bodenbinder, M. and Hagele, G. and Willner, H. and Aubke, F.} } @article {1190, title = {Rhodium(III)-cyclometalated-imine complexes: Solution behavior and reactivity with molecular hydrogen}, journal = {Organometallics}, volume = {24}, number = {7}, year = {2005}, note = {ISI Document Delivery No.: 909LJTimes Cited: 16Cited Reference Count: 41}, month = {Mar}, pages = {1445-1451}, type = {Article}, abstract = {Acetone solutions of cis, trans, cis-[Rh(H)(2)(PPh3)(2)(acetone)(2)] PF6 and cis-[Rh(PPh3)(2)(acetone)(2)]PF6 react with the imines RN=CR {\textquoteright}(R {\textquoteright}{\textquoteright}), where R = PhCH2, Ph, or C6H11; R {\textquoteright}= H or Me; and R {\textquoteright}{\textquoteright} = Ph or P-OMe-C6H4, to form orthometalated complexes exemplified by [Rh(H){RN= CR {\textquoteright}(o-C6H4)}(PPh3)(2)(acetone)]PF6 that are generally characterized spectroscopically, and in one case (where R = PhCH2, R {\textquoteright} = Me, and R {\textquoteright}{\textquoteright} = p-OMe-C6H4) by X-ray crystallography. These complexes maintain their integrity in acetone solution and show no reaction toward 1 atm H-2 at ambient conditions. In MeOH, the complexes in which R {\textquoteright} = Me simply change to the corresponding MeOH derivative, but when R {\textquoteright} = H they are partially converted to the non-orthometalated, eta(1)-N-imine species [Rh(PPh3)(2)(RN=CHR {\textquoteright}{\textquoteright})(MeOH)]PF6 (I), and in MeOH, stoichiometric hydrogenation of the imine to the corresponding amine occurs via I. We have shown recently (Inorg. Chem. 2004, 43, 4820) that the catalyzed hydrogenation of PhCH2N=C(H)Ph to dibenzylamine using cis, trans, cis- [Rh(H)(2)(PPh3)(2)(MeOH)(2)] PF6 as catalyst precursor in MeOH proceeds via a cationic Rh-(eta(1)-N-imine)(amine) intermediate (II), analogous to I but with the MeOH replaced by the amine that is formed via hydrolysis of the imine by the presence of adventitious water. Intermediate I (R = PhCH2, R {\textquoteright}{\textquoteright} = Ph) is shown to be somewhat less active than II toward H-2, but both intermediates provide viable pathways for hydrogenation of the imine. The orthometalated imine-amine complex [Rh(H){PhCH2N=C(Me)(o-C6H4)}(PPh3)(2)(NH2CH2Ph)]PF6, where the benzylamine comes from imine hydrolysis, is also isolated and characterized crystallographically.}, keywords = {ACTIVATION, AZO, C-H BONDS, CATIONIC, CLEAVAGE, COMPLEXES, CRYSTAL, LIGANDS, METAL-IMINE COMPOUNDS, RHODIUM(III) COMPLEXES}, isbn = {0276-7333}, url = {://000227861100013}, author = {Marcazzan, P. and Patrick, B. O. and James, Brian R.} } @article {1286, title = {Synthesis, characterization, and reactivity of the first hafnium alkyl complex stabilized by amidate ligands}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {83}, number = {6-7}, year = {2005}, note = {ISI Document Delivery No.: 963UVTimes Cited: 7Cited Reference Count: 20}, month = {Jun}, pages = {1037-1042}, type = {Article}, abstract = {A photo and thermally stable bis(amidate)-dibenzyl complex of Hf ([(DMP)(NO)(Ph)](2)Hf(CH2Ph)(2)(THF) (2a) was formed as a monosolvated THF adduct in near quantitative yield from Hf(CH2Ph)(4) and N-2,6-dimethylphenyl(phenyl)amide (1). Isomerization between the THF-bound product and the THF-free product can be observed visually by the conversion from a red-orange product at low temperatures to a pale yellow product at high temperatures. Solid-state crystallographic characterization of the orange product confirmed its constitution as a monosolvated species. Kinetic parameters for the exchange of the THF moiety were determined from variable-temperature NMR experiments. The product of the hydrolysis of the Hf dibenzyl species by water was characterized by X-ray crystallography, and was found to be a rare tetrametallic Hf oxo cluster species (3).}, keywords = {amidate, CHEMISTRY, COORDINATION CHEMISTRY, CRYSTAL, exchange processes, hafnium, HYDROAMINATION, MOLECULAR-STRUCTURE, organometallic, protonolysis, TITANIUM}, isbn = {0008-4042}, url = {://000231832500064}, author = {Thomson, R. K. and Patrick, B. O. and Schafer, L. L.} } @article {1151, title = {Tris(pyronato)- and tris(pyridonato)-ruthenium(III) complexes and solution NMR studies}, journal = {Inorganic Chemistry}, volume = {44}, number = {19}, year = {2005}, note = {ISI Document Delivery No.: 964EGTimes Cited: 7Cited Reference Count: 25}, month = {Sep}, pages = {6529-6535}, type = {Article}, abstract = {{The water-soluble Ru-III maltolato, ethylmaltolato, and pyridonato complexes, Ru(O-O{\textquoteright})(3) (O-O{\textquoteright} = ma (1a), etma (1b), pyd (2a)), were synthesized (Hma = 3-hydroxy-2-methyl-4-pyrone}, keywords = {CRYSTAL, LIGANDS, RUTHENIUM(II), WATER}, isbn = {0020-1669}, url = {://000231860900012}, author = {Kennedy, David C and Wu, A. and Patrick, B. O. and James, Brian R.} } @article {939, title = {Rhodium-hydrido-benzylamine-triphenylphosphine complexes: Solid-state and solution structures and implications in catalyzed imine hydrogenation}, journal = {Inorganic Chemistry}, volume = {43}, number = {21}, year = {2004}, note = {ISI Document Delivery No.: 862KITimes Cited: 10Cited Reference Count: 26}, month = {Oct}, pages = {6838-6841}, type = {Article}, abstract = {The complexes cis, trans, cis-[Rh(H)(2)(PPh3)(2)(NH2CH2Ph)(2)]PF6 (1) and cis-[Rh(PPh3)(2)(NH2CH2Ph)(2)]PF6 (2) are characterized by X-ray crystallography; the structures are maintained in CH2Cl2 where the species are in equilibrium under H-2. In MeOH and in acetone, loss of amine and/or H-2 can occur. Traces of 1 and 2 are present after a Rh-catalyzed H-2-hydrogenation of PhCH=NCH2Ph in MeOH, where the amine is generated by hydrolysis of the imine substrate through adventitious water. The findings are relevant to catalyst poisoning in the catalytic process.}, keywords = {CATIONIC COMPLEXES, CRYSTAL, DIHYDRIDO COMPLEXES, LIGANDS, metals, X-RAY}, isbn = {0020-1669}, url = {://000224489100049}, author = {Marcazzan, P. and Patrick, B. O. and James, Brian R.} } @article {762, title = {Cationic carbonyl complexes of rhodium(I) and rhodium(III): Syntheses, vibrational spectra, NMR studies, and molecular structures of tetrakis(carbonyl)rhodium(I) heptachlorodialuminate and -gallate, [Rh(CO)(4)][Al2Cl7] and [Rh(CO)(4)][Ga2Cl7]}, journal = {Inorganic Chemistry}, volume = {42}, number = {12}, year = {2003}, note = {ISI Document Delivery No.: 688AXTimes Cited: 6Cited Reference Count: 73}, month = {Jun}, pages = {3801-3814}, type = {Article}, abstract = {{Dimeric rhodium(I) bis(carbonyl) chloride, [Rh(CO)(2)(mu-Cl)](2), is found to be a useful and convenient starting material for the syntheses of new cationic carbonyl complexes of both rhodium(l) and rhodium(III). Its reaction with the Lewis acids AlCl3 or GaCl3 produces in a CO atmosphere at room temperature the salts [Rh(CO)(4)][M2CI7] (M = Al, Ga), which are characterized by Raman spectroscopy and single-crystal X-ray diffraction. Crystal data for [Rh(CO)(4)][Al2Cl7]: triclinic, space group P1 (No. 2); a = 9.705(3)}, keywords = {ACIDS, ANIONS, CO, CRYSTAL, EXCHANGE, IR, metals, MONOXIDE, RH, UNDECAFLUORODIANTIMONATE(V)}, isbn = {0020-1669}, url = {://000183410900016}, author = {von Ahsen, B. and Bach, C. and Berkei, M. and Kockerling, M. and Willner, H. and Hagele, G. and Aubke, F.} } @article {771, title = {Predominantly sigma-bonded metal carbonyl cations (sigma-carbonyls): New synthetic, structural, and bonding concepts in metal carbonyl chemistry}, journal = {Chemistry-a European Journal}, volume = {9}, number = {8}, year = {2003}, note = {ISI Document Delivery No.: 669ZKTimes Cited: 7Cited Reference Count: 60}, month = {Apr}, pages = {1668-1676}, type = {Article}, abstract = {Predominantly sigma-bonded metal carbonyl cations (sigma-carbonyls) are conveniently generated in the Lewis superacid SbF5 or the conjugate Bronsted-Lewis superacid HF-SbF5, primarily by solvolytic or reductive carbonylations. Thermally stable salts are formed with the fluoroantimonate(v) ions [SbF6](-) and [Sb2F11](-). The salts are characterised by analytical, structural, spectroscopic and computational methods. Most homoleptic carbonyl cations have very regular geometries, comensurate with their d-electron configurations: linear (d(10)), square planar (d(8)) or octahedral(d(6)). The cations with metals in oxidation states of +2 or +3 are termed "superelectrophilic". Extended molecular structures form by significant interionic C-F contacts with electrophilic carbon as acceptor. To account for all experimental observations, a conceptually simple synergetic bonding model is proposed. An outlook at anticipated future developments based on very recent results is provided.}, keywords = {(2), carbonyl ligands, CATIONS, COMPLEXES, CRYSTAL, fluoro antimonates, FLUOROSULFATE, MOLECULAR-STRUCTURE, MONOXIDE, solid-state structures, superacidic systems, UNDECAFLUORODIANTIMONATE(V), VIBRATIONAL-SPECTRA, WEAKLY COORDINATING ANIONS, X-RAY-DIFFRACTION}, isbn = {0947-6539}, url = {://000182381600002}, author = {Willner, H. and Aubke, F.} } @article {710, title = {Preorganization of achiral molecules for asymmetric synthesis through crystallization-induced immobilization in homochiral conformations}, journal = {Angewandte Chemie-International Edition}, volume = {42}, number = {32}, year = {2003}, note = {ISI Document Delivery No.: 716PRTimes Cited: 19Cited Reference Count: 24}, pages = {3775-3777}, type = {Article}, keywords = {asymmetric synthesis, CRYSTAL, crystal engineering, GEOMETRIC REQUIREMENTS, II, INDUCTION, KETONES, PHOTOCHEMICAL-REACTIONS, PHOTOCHEMISTRY, PHOTOCYCLIZATION, reaction, REACTIONS, REACTIVITY, SOLID-STATE, topochemistry}, isbn = {1433-7851}, url = {://000185038000009}, author = {Patrick, B. O. and Scheffer, J. R. and Scott, C.} } @article {411, title = {A diphenylboron chelate of an ethylenebishydroxylamine formaldehyde adduct}, journal = {Acta Crystallographica Section E-Structure Reports Online}, volume = {58}, year = {2002}, note = {ISI Document Delivery No.: 546XWTimes Cited: 3Cited Reference Count: 13Part 5}, month = {May}, pages = {O473-o475}, type = {Article}, keywords = {CRYSTAL, MOLECULAR-STRUCTURES, ORGANOBORON COMPOUNDS}, isbn = {1600-5368}, url = {://000175302500033}, author = {Kliegel, W. and Amt, H. and Patrick, B. O. and Rettig, S. J. and Trotter, J.} } @article {502, title = {Experimental and calculated molecular structures and high symmetry conformations of [Sb2F11](-) (D-4h) and 1,4-C4H4N2 center dot 2SbF(5) (D-2h)}, journal = {Solid State Sciences}, volume = {4}, number = {11-12}, year = {2002}, note = {ISI Document Delivery No.: 634TJTimes Cited: 8Cited Reference Count: 52}, month = {Nov-Dec}, pages = {1457-1463}, type = {Article}, abstract = {Antimony(V) fluoride, SbF5, forms a molecular adduct with pyrazine (1,4-diazine) of the composition 1,4-C4H4N2.2SbF5. Its molecular structure is obtained by single crystal X-ray diffraction. Crystal data of pyrazine.2SbF(5): orthorhombic, spacegroup Pbca ($\#$ 61); a = 8.8052(8) Angstrom; b = 9.948(1) Angstrom; c = 12.297(2) Angstrom; V = 1077.1(2) Angstrom(3); Z = 4; T = 173(1) K; R-1(I > 3sigma (I)) = 0.031; wR(2) = 0.083. The Sb-F-4(eq) planes are eclipsed and the planar C4H4N2 ring is at a 45degrees angle to give D-2h symmetry for pyrazine.2SbF(5). A very similar high symmetry conformation of pointgroup D-4h is found for the [Sb2F11](-) anion in the metal carbonyl salts [Rh(CO)(4)][Sb2F11], [Au(CO)(2)][Sb2F11] and in [H3F2][Sb2F11]. Structural data for pyrazine.2SbF(5) and [Sb2F11](-) from [H3F2][Sb2F11], as well as vibrational data for [Sb2F11](-) (D-4h) are compared to calculated (DFT-B3LYP) data. According to the DFT calculations, the conformation for the[Sb2F11](-) anion (D-4h) and pyrazine.2SbF(5) (D-2h) are both eclipsed with respect to the SbF5-groups and eclipsed with respect to the pyrazine plane in pyrazine.2SbF(5) in their respective ground states. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved.}, keywords = {ADDUCTS, antimony(V) fluoride, CATIONS, CRYSTAL, F-19, fluoroantimonate anion, HEXACARBONYLS, high symmetry conformation, Lewis acid-base adducts, N-donor complex of antimony(V) fluoride, superacid anion, UNDECAFLUORODIANTIMONATE(V), VIBRATIONAL-SPECTRA}, isbn = {1293-2558}, url = {://000180356800016}, author = {Sham, I. H. T. and Patrick, B. O. and von Ahsen, B. and von Ahsen, S. and Willner, H. and Thompson, R. C. and Aubke, F.} } @article {502, title = {Experimental and calculated molecular structures and high symmetry conformations of [Sb2F11](-) (D-4h) and 1,4-C4H4N2 center dot 2SbF(5) (D-2h)}, journal = {Solid State Sciences}, volume = {4}, number = {11-12}, year = {2002}, note = {ISI Document Delivery No.: 634TJTimes Cited: 8Cited Reference Count: 52}, month = {Nov-Dec}, pages = {1457-1463}, type = {Article}, abstract = {Antimony(V) fluoride, SbF5, forms a molecular adduct with pyrazine (1,4-diazine) of the composition 1,4-C4H4N2.2SbF5. Its molecular structure is obtained by single crystal X-ray diffraction. Crystal data of pyrazine.2SbF(5): orthorhombic, spacegroup Pbca ($\#$ 61); a = 8.8052(8) Angstrom; b = 9.948(1) Angstrom; c = 12.297(2) Angstrom; V = 1077.1(2) Angstrom(3); Z = 4; T = 173(1) K; R-1(I > 3sigma (I)) = 0.031; wR(2) = 0.083. The Sb-F-4(eq) planes are eclipsed and the planar C4H4N2 ring is at a 45degrees angle to give D-2h symmetry for pyrazine.2SbF(5). A very similar high symmetry conformation of pointgroup D-4h is found for the [Sb2F11](-) anion in the metal carbonyl salts [Rh(CO)(4)][Sb2F11], [Au(CO)(2)][Sb2F11] and in [H3F2][Sb2F11]. Structural data for pyrazine.2SbF(5) and [Sb2F11](-) from [H3F2][Sb2F11], as well as vibrational data for [Sb2F11](-) (D-4h) are compared to calculated (DFT-B3LYP) data. According to the DFT calculations, the conformation for the[Sb2F11](-) anion (D-4h) and pyrazine.2SbF(5) (D-2h) are both eclipsed with respect to the SbF5-groups and eclipsed with respect to the pyrazine plane in pyrazine.2SbF(5) in their respective ground states. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved.}, keywords = {ADDUCTS, antimony(V) fluoride, CATIONS, CRYSTAL, F-19, fluoroantimonate anion, HEXACARBONYLS, high symmetry conformation, Lewis acid-base adducts, N-donor complex of antimony(V) fluoride, superacid anion, UNDECAFLUORODIANTIMONATE(V), VIBRATIONAL-SPECTRA}, isbn = {1293-2558}, url = {://000180356800016}, author = {Sham, I. H. T. and Patrick, B. O. and von Ahsen, B. and von Ahsen, S. and Willner, H. and Thompson, R. C. and Aubke, F.} } @article {413, title = {An O-bridged BONBON ring system (phenol adduct)}, journal = {Acta Crystallographica Section E-Structure Reports Online}, volume = {58}, year = {2002}, note = {ISI Document Delivery No.: 536XPTimes Cited: 1Cited Reference Count: 5Part 4}, month = {Apr}, pages = {O371-O373}, type = {Article}, abstract = {1,4-Diphenyl-3,3:6,6-bis(tetramethylene)-2,5,7-trioxa-3,6-diazonia-1,4-d iboratabicyclo[2.2.1]heptanenphenol (1/1), C20H26B2N2O3.C6H5OH, contains a six-membered boat-shaped BONBON ring, with an O bridge forming a bicyclic system. The phenol molecule shows some disorder, and is linked to the heterocycle by an O-H...O hydrogen bond. The molecular dimensions of the heterocycle differ slightly from those of the parent (phenol-free) crystal, presumably as a result of the hydrogen bonding.}, keywords = {CRYSTAL, ORGANOBORON COMPOUNDS}, isbn = {1600-5368}, url = {://000174727400024}, author = {Kliegel, W. and Druckler, K. and Patrick, B. O. and Rettig, S. J. and Trotter, J.} } @article {379, title = {Phosphorus phenyl-group activation by reduced zirconium and niobium complexes stabilized by the [P2N2] macrocycle}, journal = {Journal of the American Chemical Society}, volume = {124}, number = {4}, year = {2002}, note = {ISI Document Delivery No.: 514THTimes Cited: 21Cited Reference Count: 23}, month = {Jan}, pages = {516-517}, type = {Article}, keywords = {ARENE COMPLEX, CHEMISTRY, CRYSTAL, DERIVATIVES, DINITROGEN, LIGAND, REACTIVITY, TITANIUM}, isbn = {0002-7863}, url = {://000173456800002}, author = {Fryzuk,Michael D. and Kozak, C. M. and Mehrkhodavandi, Parisa and Morello, L. and Patrick, B. O. and Rettig, S. J.} } @article {415, title = {Triphenylboroxin complex with N-cyclohexylhydroxylamine and its isobutyraldehyde nitrone}, journal = {Acta Crystallographica Section E-Structure Reports Online}, volume = {58}, year = {2002}, note = {ISI Document Delivery No.: 589AWTimes Cited: 0Cited Reference Count: 19Part 9}, month = {Sep}, pages = {O1034-O1037}, type = {Article}, abstract = {N-Cyclohexylhydroxylamine(O-B)triphenylboroxin N-cyclohexyl-C-(2-propyl)nitrone hemibenzene hemisolvate, C24H28B3NO4.C10H19NO.0.5C(6)H(6), contains one molecule of N-cyclohexylhydroxylamine in its N-oxide form added to a boroxin heterocycle, with one molecule of N-cyclohexyl-C-(2-propyl)nitrone linked by an O...H-N hydrogen bond to the protonated hydroxylamine moiety, and a molecule of benzene which is located on a centre of inversion.}, keywords = {BORON CHELATE, CRYSTAL, LIGAND, MOLECULAR-STRUCTURES, ORGANOBORON COMPOUNDS, REACTION-PRODUCTS, REARRANGEMENT}, isbn = {1600-5368}, url = {://000177736200049}, author = {Kliegel, W. and Lubkowitz, G. and Patrick, B. O. and Rettig, S. J. and Trotter, J.} } @article {374, title = {Tris(trifluoromethyl)borane carbonyl, (CF3)(3)BCO - Synthesis, physical, chemical and spectroscopic properties, gas phase, and solid state structure}, journal = {Journal of the American Chemical Society}, volume = {124}, number = {51}, year = {2002}, note = {ISI Document Delivery No.: 628QATimes Cited: 49Cited Reference Count: 86}, month = {Dec}, pages = {15385-15398}, type = {Article}, abstract = {Tris(trifluoromethyl)borane carbonyl, (CF3)(3)BCO, is obtained in high yield by the solvolysis of K[B(CF3)(4)] in concentrated sulfuric acid. The in situ hydrolysis of a single bonded CF3 group is found to be a simple, unprecedented route to a new borane carbonyl. The related, thermally unstable borane carbonyl, (C6F5)(3)BCO, is synthesized for comparison purposes by the isolation of (C6F5)(3)B in a matrix of solid CO at 16 K and subsequent evaporation of excess CO at 40 K. The colorless liquid and vapor of (CF3)3BCO decomposes slowly at room temperature. In the gas phase t(1/2) is found to be 45 min. In the presence of a large excess of (CO)-C-13, the carbonyl substituent at boron undergoes exchange, which follows a first-order rate law. Its temperature dependence yields an activation energy (EA) of 112 kJ mol(-1). Low-pressure flash thermolysis of (CF3)3BCO with subsequent isolation of the products in low-temperature matrixes, indicates a lower thermal stability of the (CF3)3B fragment, than is found for (CF3)3BCO. Toward nucleophiles (CF3)3BCO reacts in two different ways: Depending on the nucleophilicity of the reagent and the stability of the adducts formed, nucleophilic substitution of CO or nucleophilic addition to the C atom of the carbonyl group are observed. A number of examples for both reaction types are presented in an overview. The molecular structure of (CF3)(3)BCO in the gas phase is obtained by a combined microwave-electron diffraction analysis and in the solid state by single-crystal X-ray diffraction. The molecule possesses C3 symmetry, since the three CF3 groups are rotated off the two possible positions required for C3, symmetry. All bond parameters, determined in the gas phase or in the solid state, are within their standard deviations in fair agreement, except for internuclear distances most noticeably the B-CO bond lengths, which is 1.69(2) Angstrom in the solid state and 1.617(12) Angstrom in the gas phase. A corresponding shift of nu(CO) from 2267 cm(-1) in the solid state to 2251 cm-1 in the gas phase is noted in the vibrational spectra. The structural and vibrational study is supported by DFT calculations, which provide, in addition to the equilibrium structure, confirmation of experimental vibrational wavenumbers, IR-band intensities, atomic charge distribution, the dipole moment, the B-CO bond energy, and energies for the elimination of CF2 from (CF3)(x)BF3-x1 = 1-3. In the vibrational analysis 21 of the expected 26 fundamentals are observed experimentally. The B-11-, C-13-, and F-19-NMR data, as well as the structural parameters of (CF3)(3)BCO, are compared with those of related compounds.}, keywords = {= F, COMPLEXES, CRYSTAL, DERIVATIVES, IR, MICROWAVE-SPECTRUM, MOLECULAR-STRUCTURES, NMR, UNDECAFLUORODIANTIMONATE(V), X-RAY-DIFFRACTION}, isbn = {0002-7863}, url = {://000180006600046}, author = {Finze, M. and Bernhardt, E. and Terheiden, A. and Berkei, M. and Willner, H. and Christen, D. and Oberhammer, H. and Aubke, F.} } @article {5107, title = {A BONBON 6-membered ring heterocycle}, journal = {Acta Crystallographica Section E-Structure Reports Online}, volume = {57}, year = {2001}, note = {ISI Document Delivery No.: 480GNTimes Cited: 0Cited Reference Count: 10Part 10}, month = {Oct}, pages = {o943-o944}, type = {Article}, abstract = {2,5-Dimethyl-3,3,6,6-tetraphenyl-1,4-dioxa-2,5-diazonia-3,6- diboratacyclohexane, C26H28B2N2O2, occupies a crystallographic inversion centre, and contains a six-membered BONBON heterocyclic ring, with a chair conformation and dative B-N bonds of length 1.640 (1) Angstrom.}, keywords = {CRYSTAL, MOLECULAR-STRUCTURE, ORGANOBORON COMPOUNDS}, isbn = {1600-5368}, url = {://000171453800047}, author = {Kliegel, W. and Preu, L. and Riebe, U. and Patrick, B. O. and Rettig, S. J. and Trotter, J.} } @article {5108, title = {Chloral adduct of N-hydroxypiperidine}, journal = {Acta Crystallographica Section E-Structure Reports Online}, volume = {57}, year = {2001}, note = {ISI Document Delivery No.: 497RPTimes Cited: 1Cited Reference Count: 8Part 12}, month = {Dec}, pages = {O1173-O1174}, type = {Article}, keywords = {CRYSTAL}, isbn = {1600-5368}, url = {://000172469500043}, author = {Kliegel, W. and Rieber, U. and Patrick, B. O. and Rettig, S. J. and Trotter, J.} } @article {5207, title = {Effects of pressure and temperature on the solubility of monosodium L-glutamate monohydrate in water}, journal = {High Pressure Research}, volume = {21}, number = {2}, year = {2001}, note = {ISI Document Delivery No.: 572UGTimes Cited: 4Cited Reference Count: 21}, pages = {93-104}, type = {Article}, abstract = {The solubility of monosodium L-glutamate monohydrate (MSG.H2O) in water was measured at pressures in the range of 0.10-300 MPa and 298.15 K. The density of MSG solution at high concentrations and heat of solution at saturated concentration were also measured at atmospheric pressure. The solubility, m,, increased with increasing pressure and the pressure coefficient, theta(p) [equivalent to(partial derivative ln m(s)/partial derivativep)(T)], at 0. 10 MPa was (2.0 +/- 0.1) x 10(-10) Pa-1. It agrees well with (2.1 +/- 0.2) x 10(-10) Pa-1 thermodynamically estimated using the partial molar volume, the activity coefficient of the solute in solution, and the molar volume of the crystal. The excellent agreement at 0.10 MPa gives us confidence in the solubility data at higher pressures. The heat of solution data and other pertinent values were used to calculate the temperature coefficient of solubility, theta(T) [equivalent to(partial derivative ln ms/partial derivative(1/T))(p)], by a thermodynamic equality. The resulting theta(T) compares well with the data directly measured by Ogawa.}, keywords = {25-DEGREES-C, amino acids, CRYSTAL, density, heat of, HIGH-PRESSURE, molar volume, SOLUBILITY, SOLUTION}, isbn = {0895-7959}, url = {://000176792900003}, author = {Suzuki, Y. and Matsuo, H. and Koga,Yoshikata and Mukae, K. and Kawakita, T. and Sawamura, S.} } @article {5202, title = {Effects of sequential replacement of -NH2 by -OH in the tripodal tetraamine tren on its acidity and metal ion coordinating properties}, journal = {Inorganic Chemistry}, volume = {40}, number = {7}, year = {2001}, note = {ISI Document Delivery No.: 413ATTimes Cited: 26Cited Reference Count: 32}, month = {Mar}, pages = {1527-1535}, type = {Article}, abstract = {The preparation is described of two modified derivatives of the tripodal tetraamine tren, 2-hydroxy-N,N-bis(2-aminoethyl)ethylamine, NNO(2)222, and 2-amino-N,N-bis(2-hydroxyethyl)ethylamine NNO(2)222, in which one and two primary amines, respectively, have been replaced with hydroxyl groups. The aqueous acid-base and metal ion (Ni2+, Cu2+: Zn2+ coordination properties of these two compounds were studied by potentiometric, spectrophotometric, and NMR titrations. Two and three acidity constants, respectively, were determined for NNO(2)222 and NN(2)O222 by potentiometry. NMR titrations proved that deprotonation of the two OH residues in NNO(2)222, and of the one in NN(2)O222, corresponded to pK(a) > 14. Acidity constants related to deprotonation-of the terminal primary amine functions were similar in both NNO2222 and NN(2)O222 land to those in the parent compound tren), whereas deprotonation of the tertiary ammonium N atom had a very different acidity constant in each of these three compounds. Charge repulsion, polar effects, and intramolecular hydrogen bond formation an responsible for the discrepancy. Chelated diamine metal complexes for each ligand studied depended only on the basicity of the corresponding two amines, suggesting that the hydroxyl group interacted with the metal ion very weakly in acidic or neutral solutions. The ML2+ species further deprotonated to form M(L - H)(+) and M(L - 2H) complexes, in which the protons are released from the coordinated OH group. A pM vs pH correlation showed that replacing an NH2 group with a OH group in tren or NN(2)O222 makes the resulting metal complex less stable. Electronic spectra showed that the Cu(II) complexes of both NNO(2)222 and NN(2)O222 adopted a square pyramidal geometry rather than a trigonal bipyramidal geometry. The X-ray crystal structure analysis of the zinc complex [Zn(OH)(mu -NNO(2)222 - H)Zn(NNO(2)222)](2+), as its [BF4](-) salt, shows a dinuclear molecule containing two zinc ions, each coordinated in a distorted trigonal bipyramid. The coordination environment at one zinc atom is composed of the four donor groups of a mono-O-deprotonated ligand NNO(2)222 and a hydroxyl ion with the central nitrogen atom of the ligand and the hydroxyl ion in equatorial positions. The oxygen atom of the deprotonated alkoxo group bridges to the second zinc atom, which is coordinated by this atom and one undeprotonated ligand NNO2222.}, keywords = {COPPER(II) COMPLEXES, CRYSTAL, DIPERCHLORATE, donor ligands, STABILITY}, isbn = {0020-1669}, url = {://000167588300019}, author = {Song, B. and Reuber, J. and Ochs, C. and Hahn, F. E. and Lugger, T. and Orvig, Chris} } @article {5106, title = {An OBONC five-membered heterocycle}, journal = {Acta Crystallographica Section E-Structure Reports Online}, volume = {57}, year = {2001}, note = {ISI Document Delivery No.: 487NMTimes Cited: 2Cited Reference Count: 19Part 11}, month = {Nov}, pages = {O1120-O1122}, type = {Article}, abstract = {4-[(2-Hydroxy-1-naphthyl)methyl]-2,2,5-triphenyl-1,3-dioxa-4-azonia-2-bo ratacyclopent-4-ene ethanol solvate, C30H24BNO3.C2H6O, contains a five-membered O-B-O-N=C ring, which is nearly planar (slight B-envelope).}, keywords = {ACIDS, CHELATE, CRYSTAL, MOLECULAR-STRUCTURE, ORGANOBORON COMPOUNDS}, isbn = {1600-5368}, url = {://000171881800082}, author = {Kliegel, W. and Metge, J. E. and Patrick, B. O. and Rettig, S. J. and Trotter, J.} } @article {4977, title = {Syntheses, molecular structures, and vibrational spectra of chloropentacarbonylrhodium(III) and -iridium(III) undecafluorodiantimonate(V), [Rh(CO)(5)Cl][Sb2F11](2) and [Ir(CO)(5)Cl][Sb2F11](2): An experimental and density functional study}, journal = {Inorganic Chemistry}, volume = {39}, number = {9}, year = {2000}, note = {ISI Document Delivery No.: 311CJTimes Cited: 10Cited Reference Count: 91}, month = {May}, pages = {1933-1942}, type = {Article}, abstract = {{The reactions of either bis(mu-chloro)tetracarbonyldirhodium(I), [Rh(CO)(2()mu-Cl)](2), or chlorotricarbonyliridium(I), [Ir(CO)(3)Cl](n), in the conjugate Bronsted-Lewis superacid HF-SbF5 and in a CO atmosphere, produce [Rh-(CO)(5)Cl][Sb2F11](2) or [Ir(CO)(5)Cl][Sb2F11](2), respectively. In these oxidative carbonylation reactions, antimony(V) fluoride functions as an oxidizing agent. The reduced product is identified as 6SbF(3). 5SbF(5). [Rh(CO)(5)Cl][Sb2F11]2 is obtained in the form of single crystals. Crystal data: monoclinic, space group P2(1) (No. 4); a = 9.721(1)}, keywords = {ATOMS, basis sets, BEHAVIOR, CARBONYL-COMPLEXES, CRYSTAL, ELEMENTS, ENERGY, FLUOROSULFATE, MAS-NMR-SPECTRA, ORBITAL METHODS, ROW}, isbn = {0020-1669}, url = {://000086867000015}, author = {Willner, H. and Bach, C. and Wartchow, R. and Wang, C. Q. and Rettig, S. J. and Trotter, J. and Jonas, V. and Thiel, W. and Aubke, F.} } @article {4977, title = {Syntheses, molecular structures, and vibrational spectra of chloropentacarbonylrhodium(III) and -iridium(III) undecafluorodiantimonate(V), [Rh(CO)(5)Cl][Sb2F11](2) and [Ir(CO)(5)Cl][Sb2F11](2): An experimental and density functional study}, journal = {Inorganic Chemistry}, volume = {39}, number = {9}, year = {2000}, note = {ISI Document Delivery No.: 311CJTimes Cited: 10Cited Reference Count: 91}, month = {May}, pages = {1933-1942}, type = {Article}, abstract = {{The reactions of either bis(mu-chloro)tetracarbonyldirhodium(I), [Rh(CO)(2()mu-Cl)](2), or chlorotricarbonyliridium(I), [Ir(CO)(3)Cl](n), in the conjugate Bronsted-Lewis superacid HF-SbF5 and in a CO atmosphere, produce [Rh-(CO)(5)Cl][Sb2F11](2) or [Ir(CO)(5)Cl][Sb2F11](2), respectively. In these oxidative carbonylation reactions, antimony(V) fluoride functions as an oxidizing agent. The reduced product is identified as 6SbF(3). 5SbF(5). [Rh(CO)(5)Cl][Sb2F11]2 is obtained in the form of single crystals. Crystal data: monoclinic, space group P2(1) (No. 4); a = 9.721(1)}, keywords = {ATOMS, basis sets, BEHAVIOR, CARBONYL-COMPLEXES, CRYSTAL, ELEMENTS, ENERGY, FLUOROSULFATE, MAS-NMR-SPECTRA, ORBITAL METHODS, ROW}, isbn = {0020-1669}, url = {://000086867000015}, author = {Willner, H. and Bach, C. and Wartchow, R. and Wang, C. Q. and Rettig, S. J. and Trotter, J. and Jonas, V. and Thiel, W. and Aubke, F.} } @article {4810, title = {Synthesis and bonding in the diamagnetic dinuclear tantalum(IV) hydride species ([P2N2]Ta)(2)(mu-H)(4) and the paramagnetic cationic dinuclear hydride species {([P2N2]Ta)(2)(mu-H)(4)}I-+(-) ([P2N2] = PhP(CH2SiMe2NSiMe2CH2)(2)PPh): The reducing ability of}, journal = {Organometallics}, volume = {19}, number = {19}, year = {2000}, note = {ISI Document Delivery No.: 355PGTimes Cited: 20Cited Reference Count: 48}, month = {Sep}, pages = {3931-3941}, type = {Article}, abstract = {The controlled reaction of the Ta(V) trimethyl species [P2N2]TaMe3, where [P2N2] = PhP(CH2SiMe2NSiMe2CH2)(2)PPh, under 0.5 atm of hydrogen gas produces a partially hydrogenated Ta(V) species, [P2N2]TaMe2(H), of unknown structure. Under 4 atm of hydrogen gas, further hydrogenation does not produce the complex [P2N2]TaH3; instead, reduction of the tantalum center occurs to yield the dinuclear Ta(IV) hydride ([P2N2]Ta)(2)-(mu-H)(4). This diamagnetic tetrahydride fails to react with many reagents, including ethylene and carbon monoxide; however, upon addition of iodomethane, {([P2N2]Ta)(2)(mu-H)(4)}I-+(-) is produced as a paramagnetic green crystalline solid. The number of hydrides in this reaction product was confirmed by a deuterium labeling study. The results of a variable-temperature magnetic susceptibility study of this tetrahydride cation can be partially modeled with the Curie-Weiss law and a large correction for temperature-independent magnetism. Ab initio calculations using density functional theory were performed in an attempt to further understand the influence of the macrocyclic ligand in the bonding in these complexes.}, keywords = {bridging ligands, COMPLEXES, COORDINATION, CRYSTAL, DENSITY-FUNCTIONAL THEORY, DIHYDROGEN, DINITROGEN, MOLECULAR-STRUCTURES, NEUTRON-DIFFRACTION, TA-TA BOND}, isbn = {0276-7333}, url = {://000089393600025}, author = {Fryzuk,Michael D. and Johnson, S. A. and Rettig, S. J.} } @article {4508, title = {Asymmetric induction in the solid state photochemistry of an alpha-mesitylacetophenone derivative through the use of ionic chiral auxiliaries}, journal = {Tetrahedron Letters}, volume = {40}, number = {50}, year = {1999}, note = {ISI Document Delivery No.: 258FJTimes Cited: 15Cited Reference Count: 8}, month = {Dec}, pages = {8733-8736}, type = {Article}, abstract = {Irradiation in the crystalline state of salts formed between alpha-mesitylacetophenone-p-carboxylic acid and a variety of optically pure amines - the so-called {\textquoteright}ionic chiral auxiliary{\textquoteright} approach to asymmetric synthesis - leads to the corresponding 2-indanol in excellent yield and in high enantiomeric excess. X-Ray crystallography reveals the source of the enantioselectivity. (C) 1999 Elsevier Science Ltd. All rights reserved.}, keywords = {ASYMMETRIC INDUCTION, CARBOXYLATE, CRYSTAL, KETONES, PHOTOCHEMISTRY, REARRANGEMENTS}, isbn = {0040-4039}, url = {://000083827200004}, author = {Cheung, E. and Rademacher, K. and Scheffer, J. R. and Trotter, J.} } @article {4508, title = {Asymmetric induction in the solid state photochemistry of an alpha-mesitylacetophenone derivative through the use of ionic chiral auxiliaries}, journal = {Tetrahedron Letters}, volume = {40}, number = {50}, year = {1999}, note = {ISI Document Delivery No.: 258FJTimes Cited: 15Cited Reference Count: 8}, month = {Dec}, pages = {8733-8736}, type = {Article}, abstract = {Irradiation in the crystalline state of salts formed between alpha-mesitylacetophenone-p-carboxylic acid and a variety of optically pure amines - the so-called {\textquoteright}ionic chiral auxiliary{\textquoteright} approach to asymmetric synthesis - leads to the corresponding 2-indanol in excellent yield and in high enantiomeric excess. X-Ray crystallography reveals the source of the enantioselectivity. (C) 1999 Elsevier Science Ltd. All rights reserved.}, keywords = {ASYMMETRIC INDUCTION, CARBOXYLATE, CRYSTAL, KETONES, PHOTOCHEMISTRY, REARRANGEMENTS}, isbn = {0040-4039}, url = {://000083827200004}, author = {Cheung, E. and Rademacher, K. and Scheffer, J. R. and Trotter, J.} } @article {4704, title = {{Formation of Pd2X2(mu-S)(mu-dpm)(2) by reaction of PdX2(dpm) with H2S in the presence of alumina (X = halogen}, journal = {Journal of Molecular Catalysis a-Chemical}, volume = {139}, number = {2-3}, year = {1999}, note = {ISI Document Delivery No.: 162RZTimes Cited: 5Cited Reference Count: 21}, month = {Mar}, pages = {159-169}, type = {Article}, abstract = {Alumina promotes the reaction of PdX2(dpm) (3) (X = Cl, Br, I) with H2S to form Pd2X2(mu-S)(dpm)(2) (2)(1) and HX, with chemisorption of the HX (quantified by titration) providing the driving force; although no intermediate species are detected, the reaction likely proceeds via mercapto species formed via {\textquoteright}alumina activated H2S{\textquoteright}. XPS studies show interactions of species 2 and 3 with alumina, these interactions being weak as demonstrated by recovery of the species on dissolution using an appropriate solvent. For the iodide system, adsorbed HI on alumina undergoes partial photodecomposition to give I-2 and H atoms. (C) 1999 Elsevier Science B.V. All rights reserved.}, keywords = {ALUMINA, ASPECTS, bis(diphenylphosphino)methane, CONVERSION, CRYSTAL, DERIVATIVES, DINUCLEAR PALLADIUM(I) COMPLEXES, H2S, HYDROGEN-SULFIDE, Mechanistic, models, Pd2X2(mu-S)(mu-dpm)(2), PdX2(dpm), SURFACE}, isbn = {1381-1169}, url = {://000078361700006}, author = {Wong, T. Y. H. and James, Brian R. and Wong, P. C. and Mitchell, K. A. R.} } @article {4641, title = {Iron(II) 2-methylimidazolate and copper(II) 1,2,4-triazolate complexes: systems exhibiting long-range ferromagnetic ordering at low temperatures}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {77}, number = {4}, year = {1999}, note = {ISI Document Delivery No.: 204JXTimes Cited: 17Cited Reference Count: 27}, month = {Apr}, pages = {425-433}, type = {Article}, abstract = {{Crystals of [Fe(2-methylimidazolate)(2). 0.13(FeCp2)](x), 1, are orthorhombic}, keywords = {1, 2, 2-methylimidazolate, 3, 4-triazolate, 5-DIMETHYLPYRAZOLATE, BR, canted spins, CH3, COMPLEXES, copper, CRYSTAL, ferromagnets, iron, LIGANDS, MAGNETIC-PROPERTIES, METAL PYRAZOLATE POLYMERS, METALLOCENES}, isbn = {0008-4042}, url = {://000080762100003}, author = {Rettig, S. J. and Storr, A. and Summers, D. A. and Thompson, R. C. and Trotter, J.} } @article {4641, title = {Iron(II) 2-methylimidazolate and copper(II) 1,2,4-triazolate complexes: systems exhibiting long-range ferromagnetic ordering at low temperatures}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {77}, number = {4}, year = {1999}, note = {ISI Document Delivery No.: 204JXTimes Cited: 17Cited Reference Count: 27}, month = {Apr}, pages = {425-433}, type = {Article}, abstract = {{Crystals of [Fe(2-methylimidazolate)(2). 0.13(FeCp2)](x), 1, are orthorhombic}, keywords = {1, 2, 2-methylimidazolate, 3, 4-triazolate, 5-DIMETHYLPYRAZOLATE, BR, canted spins, CH3, COMPLEXES, copper, CRYSTAL, ferromagnets, iron, LIGANDS, MAGNETIC-PROPERTIES, METAL PYRAZOLATE POLYMERS, METALLOCENES}, isbn = {0008-4042}, url = {://000080762100003}, author = {Rettig, S. J. and Storr, A. and Summers, D. A. and Thompson, R. C. and Trotter, J.} } @article {4641, title = {Iron(II) 2-methylimidazolate and copper(II) 1,2,4-triazolate complexes: systems exhibiting long-range ferromagnetic ordering at low temperatures}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {77}, number = {4}, year = {1999}, note = {ISI Document Delivery No.: 204JXTimes Cited: 17Cited Reference Count: 27}, month = {Apr}, pages = {425-433}, type = {Article}, abstract = {{Crystals of [Fe(2-methylimidazolate)(2). 0.13(FeCp2)](x), 1, are orthorhombic}, keywords = {1, 2, 2-methylimidazolate, 3, 4-triazolate, 5-DIMETHYLPYRAZOLATE, BR, canted spins, CH3, COMPLEXES, copper, CRYSTAL, ferromagnets, iron, LIGANDS, MAGNETIC-PROPERTIES, METAL PYRAZOLATE POLYMERS, METALLOCENES}, isbn = {0008-4042}, url = {://000080762100003}, author = {Rettig, S. J. and Storr, A. and Summers, D. A. and Thompson, R. C. and Trotter, J.} } @article {4631, title = {Stoichiometric O-2 oxidation of bis(thioether) (octaethylporphyrinato)ruthenium(II) complexes to the corresponding sulfoxide species in acidic media. Structural confirmation of S-bonded sulfoxides}, journal = {Inorganic Chemistry}, volume = {38}, number = {24}, year = {1999}, note = {ISI Document Delivery No.: 262CATimes Cited: 7Cited Reference Count: 41}, month = {Nov}, pages = {5579-5587}, type = {Article}, abstract = {{Exposure to o(2) (or air) of a CH2Cl2, benzene, or toluene solution containing PhCO2H and Ru(OEP)(RR{\textquoteright}S)(2) (where OEP = the dianion of 2,3,7,8,12,13,17,1 8-octaethylporphyrin}, keywords = {ACETONITRILE SOLUTION, CRYSTAL, ELECTRON-TRANSFER, LIGANDS, MOLECULAR-STRUCTURE, porphyrins, RUTHENIUM(II)}, isbn = {0020-1669}, url = {://000084047000016}, author = {Pacheco, A. and James, Brian R. and Rettig, S. J.} } @article {4491, title = {Synthesis and structure of [{Mo(CO)(4)}(2)(cis-mu-F2SbF4)(3)](x)[Sb2F11](x): An ionic coordination polymer}, journal = {Inorganic Chemistry}, volume = {38}, number = {16}, year = {1999}, note = {ISI Document Delivery No.: 226JVTimes Cited: 16Cited Reference Count: 35}, month = {Aug}, pages = {3684-3687}, type = {Article}, abstract = {{The oxidation of molybdenum hexacarbonyl, Mo(CO)(6), by antimony(V) fluoride, SbF5, at 60 degrees C in an excess of liquid SbF5, produces polymeric [{Mo(CO)(4)}(2)(cis-mu-F2SbF4)(3)](x)[Sb2F11](x) as the main product. Recrystallization from HF-SbF5 produces orange prismatic crystals, suitable for a single-crystal X-ray diffraction study. Crystals of [{Mo(CO)(4)}(2)(cis-mu-F2SbF4)(3)](x)[Sb2F11](x) are monoclinic, space group P2(1)/c (No. 14)}, keywords = {ANIONS, COMPLEXES, CRYSTAL, FLUORIDE, FLUOROSULFATE, MOLYBDENUM, UNDECAFLUORODIANTIMONATE(V)}, isbn = {0020-1669}, url = {://000082017600016}, author = {Brochler, R. and Freidank, D. and Bodenbinder, M. and Sham, I. H. T. and Willner, H. and Rettig, S. J. and Trotter, J. and Aubke, F.} } @article {4491, title = {Synthesis and structure of [{Mo(CO)(4)}(2)(cis-mu-F2SbF4)(3)](x)[Sb2F11](x): An ionic coordination polymer}, journal = {Inorganic Chemistry}, volume = {38}, number = {16}, year = {1999}, note = {ISI Document Delivery No.: 226JVTimes Cited: 16Cited Reference Count: 35}, month = {Aug}, pages = {3684-3687}, type = {Article}, abstract = {{The oxidation of molybdenum hexacarbonyl, Mo(CO)(6), by antimony(V) fluoride, SbF5, at 60 degrees C in an excess of liquid SbF5, produces polymeric [{Mo(CO)(4)}(2)(cis-mu-F2SbF4)(3)](x)[Sb2F11](x) as the main product. Recrystallization from HF-SbF5 produces orange prismatic crystals, suitable for a single-crystal X-ray diffraction study. Crystals of [{Mo(CO)(4)}(2)(cis-mu-F2SbF4)(3)](x)[Sb2F11](x) are monoclinic, space group P2(1)/c (No. 14)}, keywords = {ANIONS, COMPLEXES, CRYSTAL, FLUORIDE, FLUOROSULFATE, MOLYBDENUM, UNDECAFLUORODIANTIMONATE(V)}, isbn = {0020-1669}, url = {://000082017600016}, author = {Brochler, R. and Freidank, D. and Bodenbinder, M. and Sham, I. H. T. and Willner, H. and Rettig, S. J. and Trotter, J. and Aubke, F.} } @article {4190, title = {An effective synthetic route to EF5}, journal = {Synthetic Communications}, volume = {28}, number = {19}, year = {1998}, note = {ISI Document Delivery No.: 117KHTimes Cited: 2Cited Reference Count: 17}, pages = {3701-3709}, type = {Article}, abstract = {EF5 (a 2-nitroimidazole containing an N-(pentafluoropropyl) acetamide substituent) is a very sensitive probe for quantifying the amount of hypoxia within cells; a much improved, short step, synthetic procedure is described for EF5, whose X-ray structure is also presented.}, keywords = {ANTIBODIES, BINDING, CELLS, COMPLEXES, CRYSTAL, HYPOXIA, TUMORS}, isbn = {0039-7911}, url = {://000075780100021}, author = {Baird, I. R. and Skov, K. A. and James, Brian R. and Rettig, S. J. and Koch, C. J.} } @article {4053, title = {Absolute configuration correlation studies in solid state organic photochemistry}, journal = {Pure and Applied Chemistry}, volume = {69}, number = {4}, year = {1997}, note = {ISI Document Delivery No.: XH296Times Cited: 30Cited Reference Count: 1716th IUPAC Symposium on PhotochemistryJUL 21-26, 1996HELSINKI, FINLANDIUPAC}, month = {Apr}, pages = {815-823}, type = {Proceedings Paper}, abstract = {An ever-increasing number of examples in the literature attest to the fact that photochemical reactions carried out in optically active crystalline media can lead to enantiomerically enriched products in high optical yields. Taken from our own work and that of others, this article examines the relatively few examples of such reactions in which the absolute stereochemical arrangements of the molecules in the reactant crystals are correlated with the absolute configurations of the optically active products formed by irradiation of the same crystals. Studies of this type provide penetrating insights into the mechanisms of the reactions in question, and in addition, help to pinpoint the crystal lattice-derived stereoelectronic factors that an responsible for the observed enantioselectivities.}, keywords = {CARBOXYLATE, CRYSTAL, PHOTOREARRANGEMENT, SUPRAMOLECULAR PHOTOCHEMISTRY}, isbn = {0033-4545}, url = {://A1997XH29600027}, author = {Leibovitch, M. and Olovsson, G. and Scheffer, J. R. and Trotter, J.} } @article {4053, title = {Absolute configuration correlation studies in solid state organic photochemistry}, journal = {Pure and Applied Chemistry}, volume = {69}, number = {4}, year = {1997}, note = {ISI Document Delivery No.: XH296Times Cited: 30Cited Reference Count: 1716th IUPAC Symposium on PhotochemistryJUL 21-26, 1996HELSINKI, FINLANDIUPAC}, month = {Apr}, pages = {815-823}, type = {Proceedings Paper}, abstract = {An ever-increasing number of examples in the literature attest to the fact that photochemical reactions carried out in optically active crystalline media can lead to enantiomerically enriched products in high optical yields. Taken from our own work and that of others, this article examines the relatively few examples of such reactions in which the absolute stereochemical arrangements of the molecules in the reactant crystals are correlated with the absolute configurations of the optically active products formed by irradiation of the same crystals. Studies of this type provide penetrating insights into the mechanisms of the reactions in question, and in addition, help to pinpoint the crystal lattice-derived stereoelectronic factors that an responsible for the observed enantioselectivities.}, keywords = {CARBOXYLATE, CRYSTAL, PHOTOREARRANGEMENT, SUPRAMOLECULAR PHOTOCHEMISTRY}, isbn = {0033-4545}, url = {://A1997XH29600027}, author = {Leibovitch, M. and Olovsson, G. and Scheffer, J. R. and Trotter, J.} } @article {4117, title = {Transition metal azolates from metallocenes .1. Dimetallic and trimetallic cyclopentadienyl nickel pyrazolates, synthesis and structural studies}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {75}, number = {7}, year = {1997}, note = {ISI Document Delivery No.: XR886Times Cited: 10Cited Reference Count: 23}, month = {Jul}, pages = {949-958}, type = {Article}, abstract = {{The reactions of nickelocene with pyrazoles in benzene solution have resulted in the isolation of either dimeric compounds, [CpNi(mu-pz{\textquoteright})](2), (room temperature conditions) or trimetallic complexes, [CpNi(mu-pz {\textquoteright}{\textquoteright})(2)](2)Ni, (elevated temperature conditions). Both dimeric and trimetallic species were obtained as red crystalline materials and X-ray structural investigations are reported for representative samples of each type. Structural features are interpreted and compared with similar, previously reported, nickel pyrazolate structures. Crystals of [CpNi(3,5-diMepz)](2) (C20H24N4Ni2), 1, are orthorhombic}, keywords = {3, 5-DIMETHYLPYRAZOLATE COMPLEXES, BR, CH3, CRYSTAL, crystal structures, CYCLOPENTADIENYL, MAGNETIC-PROPERTIES, MOLECULAR-STRUCTURES, NICKEL, nickelocene, POLYMERS, pyrazolates}, isbn = {0008-4042}, url = {://A1997XR88600004}, author = {Rettig, S. J. and Storr, A. and Summers, D. A. and Thompson, R. C. and Trotter, J.} } @article {4117, title = {Transition metal azolates from metallocenes .1. Dimetallic and trimetallic cyclopentadienyl nickel pyrazolates, synthesis and structural studies}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {75}, number = {7}, year = {1997}, note = {ISI Document Delivery No.: XR886Times Cited: 10Cited Reference Count: 23}, month = {Jul}, pages = {949-958}, type = {Article}, abstract = {{The reactions of nickelocene with pyrazoles in benzene solution have resulted in the isolation of either dimeric compounds, [CpNi(mu-pz{\textquoteright})](2), (room temperature conditions) or trimetallic complexes, [CpNi(mu-pz {\textquoteright}{\textquoteright})(2)](2)Ni, (elevated temperature conditions). Both dimeric and trimetallic species were obtained as red crystalline materials and X-ray structural investigations are reported for representative samples of each type. Structural features are interpreted and compared with similar, previously reported, nickel pyrazolate structures. Crystals of [CpNi(3,5-diMepz)](2) (C20H24N4Ni2), 1, are orthorhombic}, keywords = {3, 5-DIMETHYLPYRAZOLATE COMPLEXES, BR, CH3, CRYSTAL, crystal structures, CYCLOPENTADIENYL, MAGNETIC-PROPERTIES, MOLECULAR-STRUCTURES, NICKEL, nickelocene, POLYMERS, pyrazolates}, isbn = {0008-4042}, url = {://A1997XR88600004}, author = {Rettig, S. J. and Storr, A. and Summers, D. A. and Thompson, R. C. and Trotter, J.} } @article {4117, title = {Transition metal azolates from metallocenes .1. Dimetallic and trimetallic cyclopentadienyl nickel pyrazolates, synthesis and structural studies}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {75}, number = {7}, year = {1997}, note = {ISI Document Delivery No.: XR886Times Cited: 10Cited Reference Count: 23}, month = {Jul}, pages = {949-958}, type = {Article}, abstract = {{The reactions of nickelocene with pyrazoles in benzene solution have resulted in the isolation of either dimeric compounds, [CpNi(mu-pz{\textquoteright})](2), (room temperature conditions) or trimetallic complexes, [CpNi(mu-pz {\textquoteright}{\textquoteright})(2)](2)Ni, (elevated temperature conditions). Both dimeric and trimetallic species were obtained as red crystalline materials and X-ray structural investigations are reported for representative samples of each type. Structural features are interpreted and compared with similar, previously reported, nickel pyrazolate structures. Crystals of [CpNi(3,5-diMepz)](2) (C20H24N4Ni2), 1, are orthorhombic}, keywords = {3, 5-DIMETHYLPYRAZOLATE COMPLEXES, BR, CH3, CRYSTAL, crystal structures, CYCLOPENTADIENYL, MAGNETIC-PROPERTIES, MOLECULAR-STRUCTURES, NICKEL, nickelocene, POLYMERS, pyrazolates}, isbn = {0008-4042}, url = {://A1997XR88600004}, author = {Rettig, S. J. and Storr, A. and Summers, D. A. and Thompson, R. C. and Trotter, J.} } @article {3678, title = {The ionic auxiliary concept in solid state organic photochemistry}, journal = {Accounts of Chemical Research}, volume = {29}, number = {4}, year = {1996}, note = {ISI Document Delivery No.: UE738Times Cited: 121Cited Reference Count: 42}, month = {Apr}, pages = {203-209}, type = {Review}, keywords = {ASYMMETRIC INDUCTION, chirality, CRYSTAL, KETONES, PHOTOREARRANGEMENT, REACTIVITY, SALTS, SUPRAMOLECULAR PHOTOCHEMISTRY}, isbn = {0001-4842}, url = {://A1996UE73800006}, author = {Gamlin, J. N. and Jones, R. and Leibovitch, M. and Patrick, B. and Scheffer, J. R. and Trotter, J.} } @article {3678, title = {The ionic auxiliary concept in solid state organic photochemistry}, journal = {Accounts of Chemical Research}, volume = {29}, number = {4}, year = {1996}, note = {ISI Document Delivery No.: UE738Times Cited: 121Cited Reference Count: 42}, month = {Apr}, pages = {203-209}, type = {Review}, keywords = {ASYMMETRIC INDUCTION, chirality, CRYSTAL, KETONES, PHOTOREARRANGEMENT, REACTIVITY, SALTS, SUPRAMOLECULAR PHOTOCHEMISTRY}, isbn = {0001-4842}, url = {://A1996UE73800006}, author = {Gamlin, J. N. and Jones, R. and Leibovitch, M. and Patrick, B. and Scheffer, J. R. and Trotter, J.} } @article {3642, title = {Reaction of methanol with perfluorotetracyclobuta-1,3,5,7-cyclooctatetraene}, journal = {Journal of Fluorine Chemistry}, volume = {76}, number = {2}, year = {1996}, note = {ISI Document Delivery No.: UA116Times Cited: 4Cited Reference Count: 13}, month = {Feb}, pages = {121-124}, type = {Article}, abstract = {Perfluorotetracyclobuteno-1,3,5,7-cyclooctatetraene (PCOT) is a planar and centrosymmetric molecule which possesses an extraordinary electron affinity due to the planarity of the eight pi-electron system and the cumulative electron-withdrawing effects of the 16 fluorine atoms. An improved method for the synthesis of PCOT and the product resulting from the spontaneous reaction of PCOT with excess alcohol is reported. Crystal structures of the methyl (1) and ethyl (2) derivatives are described.}, keywords = {CRYSTAL, IR spectroscopy, MASS SPECTROMETRY, METHANOL, NMR spectroscopy, perfluorotetracyclobutacyclo-octatetraene, reaction, STRUCTURE}, isbn = {0022-1139}, url = {://A1996UA11600002}, author = {Cullen, W. R. and Rettig, S. J. and Moore, A. E. and Soulen, R. L.} } @article {3751, title = {Rhenium complexes of P,P,P{\textquoteright},P{\textquoteright}-tetrakis(o-hydroxyphenyl)diphosphinoethane}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {74}, number = {5}, year = {1996}, note = {ISI Document Delivery No.: UP791Times Cited: 6Cited Reference Count: 25}, month = {May}, pages = {722-729}, type = {Article}, abstract = {Preparation of the hydrochloride salt of a new potentially hexadentate ligand precursor P,P,P{\textquoteright},P{\textquoteright}-tetrakis(o-hydroxyphenyl)diphosphinoethane dihydrochloride (abbreviated H4P2O4 . 2HCl) is described. From H4P2O4 . 2HCl, neutral [Re2O2Cl2(PPh(3))(2)(mu-P2O4)] and dianionic [Re2O2Br4(mu-P2O4)](2-) dinuclear rhenium(V) complexes were synthesized. The complexes have been characterized by elemental analysis, infrared spectroscopy, mass spectrometry, and (HP)-H-1-P-31{H-1} NMR spectra. P-31{H-1} NMR revealed that only one isomer, presumably the anti, was present for [Re2O2Cl2(PPh(3))(2)(mu-P2O4)], and that two isomers, both anti and syn isomers, were observed for [Re2O2Br4(mu-P2O4)](2-). The coligands (PPh, for the former, Br- for the latter) of both complexes underwent ligand exchange with pyridine.}, keywords = {CHEMISTRY, COORDINATION, CRYSTAL, DIMER, ISOMERS, NITRIDO COMPLEXES, P, P{\textquoteright}, P{\textquoteright}-tetrakis(o-hydroxyphenyl)diphosphinoethane, rhenium, technetium}, isbn = {0008-4042}, url = {://A1996UP79100012}, author = {Luo, H. Y. and Orvig, Chris} } @article {3855, title = {Selectivity of potentially hexadentate amine phenols for Ga3+ and In3+ in aqueous solution}, journal = {Inorganic Chemistry}, volume = {35}, number = {3}, year = {1996}, note = {ISI Document Delivery No.: TT717Times Cited: 29Cited Reference Count: 48}, month = {Jan}, pages = {715-724}, type = {Article}, abstract = {{A new series of linear N4O2 amine phenols (H(2)badd, H(2)Brbadd, and H(2)Clbadd) based on N,N{\textquoteright}-bis(3-aminopropyl)-ethylenediamine (tnentn) were prepared and characterized by spectroscopic techniques. Monocationic hexadentate metal complexes with the tnentn-based amine phenols were obtained from the reactions of Ga3+ and In3+ with the Linear amine phenol in the presence of a weak base (acetate). The molecular structure of [Ga(Brbadd)]ClO4 has been determined by X-ray crystallography; crystals of [Ga(Brbadd)][ClO4] (C22H30Br2ClGaN4O6) are orthorhombic: a = 12.462(1) Angstrom}, keywords = {ACID, aluminum, CHELATION, CRYSTAL, GA-68, gallium, IONS, LIGANDS, STABILITIES, TRIVALENT METAL-COMPLEXES}, isbn = {0020-1669}, url = {://A1996TT71700029}, author = {Wong, E. and Caravan, P. and Liu, S. and Rettig, S. J. and Orvig, Chris} } @article {3842, title = {Solvolysis reactions in liquid antimony (V) fluoride. A convenient and versatile synthetic method}, journal = {European Journal of Solid State and Inorganic Chemistry}, volume = {33}, number = {9}, year = {1996}, note = {ISI Document Delivery No.: VK527Times Cited: 9Cited Reference Count: 71}, pages = {917-930}, type = {Article}, abstract = {{Solvolysis reactions of various fluorosulfates in liquid antimony (V) fluoride allow the synthesis of a wide range of fluoroantimonate (V) salts with main group, organometallic and transition metal cations. In the presence of carbon monoxide, CO, at pressures of 0.5 to 2.0 atmospheres a new group of homoleptic carbonyl cations of electronrich metals (Hg, Au, Pt, Pd, Ir, Ru, and Os) form with [Sb2F11](-) as anion. The salts show relatively high thermal stability (> 100 degrees C). The geometries of the cations [Au(CO)(2)](+), [Hg(CO)(2)](2+) (linear) and [M(CO)(4)](2+)}, keywords = {CATIONS, CRYSTAL, FLUOROSULFATES, MAGNETIC-PROPERTIES, MAS NMR-SPECTRA, MOLECULAR-STRUCTURE, NOBLE-METALS, TRIS(FLUOROSULFATE), UNDECAFLUORODIANTIMONATE(V), VIBRATIONAL-SPECTRA}, isbn = {0992-4361}, url = {://A1996VK52700012}, author = {Wang, C. and Hwang, G. and Siu, S. C. and Aubke, F. and Bley, B. and Bodenbinder, M. and Bach, C. and Willner, H.} } @article {3643, title = {Synthesis of some phosphino- and arsinobenzenechromium tricarbonyl derivatives and metal carbonyl clusters}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {74}, number = {11}, year = {1996}, note = {ISI Document Delivery No.: WC124Times Cited: 6Cited Reference Count: 36}, month = {Nov}, pages = {2167-2181}, type = {Article}, abstract = {{The synthesis of a number of new phosphino- and arsinobenzenechromium tricarbonyl ligands ER(2)C(6)H(5)Cr(CO)(3) (ER(2) = PEt(2), PPr2i, PBu(2)(t), PPh(2), AsPh(2) AsMe(2)), ER[C6H5Cr(CO)(3)](2) (ER = PEt, PBu(t), PPh, AsPh) has been achieved by reacting lithium derivatives of benzenechromium tricarbonyl with appropriate chlorophosphines or iodoarsines. The spectroscopic properties of these ligands are described. The structure of (Pr2PC6H5Cr)-P-i(CO)(3) was determined by an X-ray crystallographic study. This is the first solid state structure to be reported for a phosphinobenzenechromium tricarbonyl derivative. The structures of four metal carbonyl cluster complexes were also determined. Crystals of (Pr2PC6H5Cr)-P-i(CO)(3) (3, C15H19CrO3P) are monoclinic, space group P2(1)/c}, keywords = {(BENZYNE)CHROMIUM, arsinobenzenechromium tricarbonyl derivatives, CHEMISTRY, COMPLEXES, CRYSTAL, DERIVATIVES, LIGAND-SUBSTITUTED DERIVATIVES, metal carbonyl clusters, OS3(CO)12, P(OCH2CF3)3, phosphinobenzenechromium tricarbonyl, RU3(CO)12, STEREOCHEMISTRY, structures, TRICARBONYL, X-ray structures}, isbn = {0008-4042}, url = {://A1996WC12400031}, author = {Cullen, W. R. and Rettig, S. J. and Zhang, H. L.} } @article {3574, title = {COMPLEXATION OF THE POTENTIALLY HEPTADENTATE LIGAND H(3)DHA(3)TREN WITH LANTHANIDES - ARCHITECTURE OF A [ND(NO3)(3)(H(3)DHA(3)TREN)](N) POLYMER WITH PROFUSE MODES OF NITRATE COORDINATION}, journal = {Inorganic Chemistry}, volume = {34}, number = {19}, year = {1995}, note = {ISI Document Delivery No.: RV737Times Cited: 22Cited Reference Count: 19}, month = {Sep}, pages = {4921-4925}, type = {Note}, keywords = {AMINE PHENOL LIGANDS, CRYSTAL, MOLECULAR-STRUCTURES}, isbn = {0020-1669}, url = {://A1995RV73700030}, author = {Yang, L. W. and Liu, S. and Rettig, S. J. and Orvig, Chris} } @article {3575, title = {COMPLEXES OF TRIVALENT METAL-IONS WITH POTENTIALLY HEPTADENTATE N4O3 SCHIFF-BASE AND AMINE PHENOL LIGANDS OF VARYING RIGIDITY}, journal = {Inorganic Chemistry}, volume = {34}, number = {8}, year = {1995}, note = {ISI Document Delivery No.: QT603Times Cited: 67Cited Reference Count: 47}, month = {Apr}, pages = {2164-2178}, type = {Article}, abstract = {{The synthesis and characterization of several potentially heptadentate N4O3 Schiff bases and amine phenols, as well as a series of their mononuclear and dinuclear complexes with indium and the lanthanides are reported. Schiff bases containing imidazolidine rings were the products of the known condensation reaction of triethylenetetramine with 3 equiv of 5-substituted salicylaldehydes to form H(3)api (5-H-substituent), H(3)Clapi (5-Cl-substituent), or H(3)Brapi (5-Br-substituent); KBH4 reduction of these Schiff bases gave the appropriate isomeric N4O3 amine phenols H-3(1,2,4-btt) and H-3(1,1,4,-btt), as well as an acetone adduct, H-3(1,2,4-ahi). The Schiff bases reacted with 1 equiv of a lanthanide (Ln(3+)) nitrate to produce mononuclear nine-coordinated [Ln(H(3)Xapi)-(NO3)(3)] complex wherein the ligand adopts a tridentate capping coordination mode, whereas the amine phenols formed mononuclear seven-coordinate complexes with the lanthanides and indium; homodinuclear complexes [LnL]2 were also obtained with the Schiff bases. The X-ray structures of the Schiff bases H(3)api and H(3)Clapi, the mononuclear amine phenol complexes Yb(1,2,4-btt) . 0.5CH(3)OH and In(1,1,4-btt), and the homodinuclear Schiff base complex [La(Brapi)](2) . 2CHCl(3) have been determined. Crystals of H(3)api (C27H30N4O3) are monoclinic, space group P2(1)/a}, keywords = {BRIDGES, CRYSTAL, ETHER, LANTHANIDE COMPLEXES, MOLECULAR-STRUCTURE, SALTS, TETRAHYDRATE, WATER, X-RAY}, isbn = {0020-1669}, url = {://A1995QT60300032}, author = {Yang, L. W. and Liu, S. and Wong, E. and Rettig, S. J. and Orvig, Chris} } @article {3296, title = {FACILE THERMAL REACTIVITY OF CP-ASTERISK-W(NO)(CH(2)SIME(3)) (CPH=CH2) - UNIQUE ALKANE C-H ACTIVATION UNDER MILD CONDITIONS}, journal = {Journal of the American Chemical Society}, volume = {117}, number = {11}, year = {1995}, note = {ISI Document Delivery No.: QN458Times Cited: 18Cited Reference Count: 16}, month = {Mar}, pages = {3288-3289}, type = {Note}, keywords = {ALKYL, BONDS, COMPLEXES, CRYSTAL, DEHYDROGENATION, LIGAND}, isbn = {0002-7863}, url = {://A1995QN45800040}, author = {Debad, J. D. and Legzdins,Peter and Lumb, S. A. and Batchelor, R. J. and Einstein, F. W. B.} } @article {3557, title = {HEXADENTATE N4O2 AMINE PHENOL COMPLEXES OF GALLIUM AND INDIUM}, journal = {Inorganic Chemistry}, volume = {34}, number = {1}, year = {1995}, note = {ISI Document Delivery No.: QC360Times Cited: 46Cited Reference Count: 39}, month = {Jan}, pages = {93-101}, type = {Article}, abstract = {{Several linear N4O2 amine phenols based on triethylenetetramine (trien) were prepared and characterized by spectroscopic techniques (H(2)bad = 1,10-bis(2-hydroxybenzyl)-1,4,7,10-tetraazadecane; H(2)Clbad = 1,10-bis(2-hydroxy-5-chlorobenzyl)-1,4,7,10-tetraazadecane; H(2)Brbad = 1,10-bis(2-hydroxy-5-bromobenzyl)-1,4,7,10-tetraazadecane). These amine phenols were prepared by the in situ reduction of the corresponding Schiff bases, which were in turn derived from condensation reactions of trien with the appropriately substituted salicylaldehyde. Characterization of the amine phenols revealed two hydroxybenzyl groups connected to the trien backbone via the terminal primary amine nitrogen atoms. There are six potential sites for coordination to a metal ion: four amine nitrogens and two phenolate oxygens. Acetone adducts, prepared by refluxing the amine phenols in acetone, contained two imidazolidine rings, each of which was formed by the reaction of acetone with one inner and one terminal amine nitrogen. Monocationic metal complexes were obtained from the reactions of Ga3+ and In3+ with the N4O2 amine phenols in the presence of 2 equiv of base (acetate). The molecular structure of [Ga(Brbad)]-ClO4.(CH3)(2)SO (C22H32Br2ClGaN4O7S}, keywords = {aluminum, CHEMISTRY, COORDINATION, CRYSTAL, DESIGN, Iron(III), METAL-IONS, SCHIFF-BASE LIGANDS}, isbn = {0020-1669}, url = {://A1995QC36000018}, author = {Wong, E. and Liu, S. and Lugger, T. and Hahn, F. E. and Orvig, Chris} } @article {3414, title = {LIGAND CONTROL OF ELECTRONIC STABILITY OF CPCR(NO)(LIGAND)(2) COMPLEXES}, journal = {Journal of the American Chemical Society}, volume = {117}, number = {42}, year = {1995}, note = {ISI Document Delivery No.: TC326Times Cited: 10Cited Reference Count: 58}, month = {Oct}, pages = {10521-10530}, type = {Article}, abstract = {{Treatment of [CpCr(NO)I](2) with an excess of a Lewis base, L, in CH2Cl2 leads to the formation of the complex salts [CpCr(NO)(L)(2)](+)[I](-) ([1]I-+(-)}, keywords = {CRYSTAL, CYCLOPENTADIENYL, ETA-5-C5H5, {CHROMIUM}, isbn = {0002-7863}, url = {://A1995TC32600013}, author = {Legzdins,Peter and McNeil, W. S. and Batchelor, R. J. and Einstein, F. W. B.} } @article {3291, title = {NAPHTHYNE - OSMIUM AND RUTHENIUM CLUSTER DERIVATIVES}, journal = {Organometallics}, volume = {14}, number = {3}, year = {1995}, note = {ISI Document Delivery No.: QL624Times Cited: 14Cited Reference Count: 18}, month = {Mar}, pages = {1466-1470}, type = {Article}, abstract = {{Reaction of the 1-naphthyl derivatives E(1-C10H7)(3) (E = P, AS) with M(3)(CO)(12) (M = RU, Os) affords the series of naphthyne complexes M(3)(CO)(8)(mu-H)(2)[mu(3)-eta(4)-(C10H7)(2)E(C10H5)] (5-8) in moderate to good yield, via double metalation of the unsubstituted aromatic ring. Metalation of the substituted aromatic ring results in one complex, Os-3(CO)(9)(mu-H)[(C10H7)(2)P-(C10H6)]. Cleavage of an As-naphthyl bond affords a low yield of the naphthyne complex Ru-4(CO)(10)(mu-CO)[mu(4)-As(C10H7)][mu(4)-C10H6] (11), in which the aryne ring is at an angle of 75 degrees to the RU(4) plane and acts as a four-electron donor, making 11 formally electron deficient. Crystals of 5 are monoclinic, with a = 25.746(1) Angstrom}, keywords = {COMPLEXES, CRYSTAL, MOLECULAR-STRUCTURES, TRICARBONYL}, isbn = {0276-7333}, url = {://A1995QL62400056}, author = {Cullen, W. R. and Rettig, S. J. and Zheng, T. C.} } @article {3321, title = {ROUTES TO DICATIONIC RUTHENIUM(II) NITRILE COMPLEXES CONTAINING CHELATING DIPHOSPHINE LIGANDS - X-RAY ANALYSES OF RU(DPPB)(MECN)(4)(2+)2PF(6)- (DPPB=PH(2)P(CH2)(4)PPH(2)) AND TRANS-RUCL2(MECN)(4)}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {73}, number = {7}, year = {1995}, note = {ISI Document Delivery No.: RT503Times Cited: 13Cited Reference Count: 27}, month = {Jul}, pages = {1084-1091}, type = {Article}, abstract = {{Routes to the Ru(PP)(RCN)(4)(2+)2PF(6)(-) complexes (PP = Ph(2)P(CH2)(4)PPh(2), dppb; R = Me, Ph) from the Ru(II) precursors Ru2Cl4(PP)(2) and RuCl2(PP)(PPh(3)) have been established. The X-ray crystal structure of the dppb-MeCN derivative (3) is described, and the steric effect of the diphosphine ligand is examined by comparison with the crystal structure of trans-RuCl2(MeCN)(4) (5), which is also presented. Crystals of 3 are triclinic}, keywords = {ACETONITRILE, CRYSTAL, DIPHOSPHINE LIGANDS, EXCHANGE, HYDROGENATION, KINETICS, NITRILES, ruthenium}, isbn = {0008-4042}, url = {://A1995RT50300023}, author = {Fogg, D. E. and Rettig, S. J. and James, Brian R.} } @article {3241, title = {RUTHENIUM COMPLEXES CONTAINING TERTIARY PHOSPHINES AND IMIDAZOLE OR 2,2{\textquoteright}-BIPYRIDINE LIGANDS}, journal = {Inorganica Chimica Acta}, volume = {230}, number = {1-2}, year = {1995}, note = {ISI Document Delivery No.: QN719Times Cited: 26Cited Reference Count: 39}, month = {Mar}, pages = {111-117}, type = {Article}, abstract = {{Complexes RuCl3(PPh(3))L(2) (L=MeIm (1a), Im (1b)) and [RuCl2(PPh(3))(2)(bipy)]Cl . 4H(2)O (2) have been synthesized via the ruthenium(III) precursor RuCl3(PPh(3))(2) (DMA), and characterized, including an X-ray structural analysis for 1a (MeIm=N-methylimidazole}, keywords = {BIPYRIDINE COMPLEXES, CRYSTAL, crystal structures, DERIVATIVES, HYDROGEN, IMIDAZOLE COMPLEXES, ruthenium complexes, TERTIARY PHOSPHINE COMPLEXES, X-ray structure}, isbn = {0020-1693}, url = {://A1995QN71900015}, author = {Batista, A. A. and Polato, E. A. and Queiroz, S. L. and Nascimento, O. R. and James, Brian R. and Rettig, S. J.} } @article {3398, title = {STRUCTURAL STUDIES OF ORGANOBORON COMPOUNDS .63. REACTION OF KETOXIMES WITH ALDEHYDES AND DIPHENYLBORINIC ACID, AND THE CRYSTAL AND MOLECULAR-STRUCTURES OF 2 DIFFERENT TYPES OF BORON CHELATES AND ONE OF THE PRECURSOR ALDEHYDE ADDUCTS}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {73}, number = {6}, year = {1995}, note = {ISI Document Delivery No.: RM831Times Cited: 12Cited Reference Count: 48}, month = {Jun}, pages = {835-845}, type = {Article}, abstract = {{The diphenylboron chelates of ketoxime adducts to formaldehyde and trichloroacetaldehyde (chloral) have been synthesized. The reactions were carried out as three-component one-pot reactions, and also as two-step reactions for the ketoxime chloral adducts, which were isolated and characterized before reaction with oxybis(diphenylborane) to form the diphenylboron chelates. One of the intermediate adducts and two of the diphenylboron chelates have been characterized by X-ray crystallographic analysis. Crystals of O-(2,2,2-trichloro-1-hydroxyethyl)-2-propanonoxime, 8d, are monoclinic}, keywords = {BORON CHELATES, BORON COMPOUNDS, CRYSTAL, N-(2-HYDROXYALKYL)NITRONES, NITRONES, ORGANBORON COMPOUNDS, RING-CHAIN ISOMERISM, structures}, isbn = {0008-4042}, url = {://A1995RM83100010}, author = {Kliegel, W. and Riebe, U. and Rettig, S. J. and Trotter, J.} } @article {3472, title = {SYNTHESIS AND CHARACTERIZATION OF (OCTAETHYLPORPHYRINATO)RUTHENIUM(II) AND (OCTAETHYLPORPHYRINATO)RUTHENIUM(III) COMPLEXES WITH THIOETHER, SULFOXIDE, AND BENZOATE AXIAL LIGANDS}, journal = {Inorganic Chemistry}, volume = {34}, number = {13}, year = {1995}, note = {ISI Document Delivery No.: RF414Times Cited: 16Cited Reference Count: 58}, month = {Jun}, pages = {3477-3484}, type = {Article}, abstract = {{Complexes in the series Ru(OEP)(RR{\textquoteright}S)(2) and Ru(OEP)(RR{\textquoteright}SO)(2) (where OEP = the dianion of 2,3,7,8,12,13,17,18-octaethylporphyrin}, keywords = {AEROBIC EPOXIDATION, CHEMISTRY, CRYSTAL, ELECTRON-TRANSFER, EXTRAPLANAR LIGANDS, OXIDATION, REACTIVITY, redox properties, RUTHENIUM PORPHYRIN DIMERS, SYSTEM}, isbn = {0020-1669}, url = {://A1995RF41400016}, author = {Pacheco, A. and James, Brian R. and Rettig, S. J.} } @article {2986, title = {BIS(ALKOXY)RUTHENIUM(IV) PORPHYRIN COMPLEXES AND AEROBIC OXIDATION OF ALCOHOLS}, journal = {Journal of the Chemical Society-Chemical Communications}, number = {23}, year = {1994}, note = {ISI Document Delivery No.: PW348Times Cited: 25Cited Reference Count: 14}, month = {Dec}, pages = {2669-2670}, type = {Article}, abstract = {The complex trans-Ru-VI(tmp)(O)(2) (tmp = dianion of 5,10,15,20-tetramesitylporphyrin) oxidizes species, of which the bis(isopropoxy) complex has been characterized crystallographically.}, keywords = {CRYSTAL, EPOXIDATION, REACTIVITY, RUTHENIUM OXO COMPLEXES}, isbn = {0022-4936}, url = {://A1994PW34800008}, author = {Cheng, S. Y. S. and Rajapakse, N. and Rettig, S. J. and James, Brian R.} } @article {3005, title = {CHARACTERIZATION AND NONRIGID BEHAVIOR OF A CARBOXYLATE-BRIDGED RHODIUM DIMER}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {72}, number = {5}, year = {1994}, note = {ISI Document Delivery No.: NU280Times Cited: 0Cited Reference Count: 47}, month = {May}, pages = {1294-1301}, type = {Article}, abstract = {{Bis(mu-t-butylacetato)bis(norbornadiene)dirhodium(I) 1 is prepared by a reaction between pivaloyl camphor and (norbornadiene)rhodium(I) chloride dimer. A molecular rearrangement takes place in which the pivaloyl groups of the pivaloyl camphor starting material are incorporated into the end product as bridging t-butylcarboxylate ligands. A variable temperature H-1 NMR study and corresponding dynamic computer fit of the NMR data, and crystal structure are reported for the structurally nonrigid dimer. Crystals of 1 are triclinic}, keywords = {BINUCLEAR DIRHODIUM COMPOUNDS, CATALYSTS, COMPLEXES, CRYSTAL, ELECTRONIC-STRUCTURE, LIGANDS, MOLECULAR-STRUCTURE, ORTHO-METALATION REACTIONS, phosphines, RH-RH BOND}, isbn = {0008-4042}, url = {://A1994NU28000012}, author = {Cullen, W. R. and Rettig, S. J. and Wickenheiser, E. B.} } @article {2792, title = {METAL PYRAZOLATE POLYMERS .4. SYNTHESIS, CHARACTERIZATION, AND MAGNETIC-PROPERTIES OF [CO(PZ-ASTERISK)2]X COMPLEXES (WHERE PZ-ASTERISK = PYRAZOLATE, 3-METHYLPYRAZOLATE, AND 4-SUBSTITUTED 3,5-DIMETHYLPYRAZOLATE)}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {71}, number = {9}, year = {1993}, note = {ISI Document Delivery No.: MC957Times Cited: 20Cited Reference Count: 32}, month = {Sep}, pages = {1412-1424}, type = {Article}, abstract = {The title compounds were prepared and characterized by X-ray powder diffraction, scanning electron microscopy, vibrational and electronic spectroscopy, and magnetic susceptibility measurements. Indirect evidence supports polymeric one-dimensional chain structures involving double pyrazolate bridges linking pseudo-tetrahedrally coordinated metal centres in all six compounds. The spectroscopic studies indicate a greater degree of distortion of the CoN4 chromophore from regular stereochemistry in the 4-substituted 3,5-dimethylpyrazolate complexes. The magnetic studies reveal anisotropy in the susceptibilities and the presence of significant antiferromagnetic exchange. Magnetic modelling employing both Ising and Heisenberg models suggests the exchange behaviour is probably of the Heisenberg type with zero-field splitting effects producing Ising-like exchange at low temperatures. The derived J values (approximately -2 to -6 cm-1) have been used to qualitatively rank the magnitude of exchange as follows: 4-Hpz almost-equal-to 3-Mepz >> 4-Medmpz almost-equal-to 4-Cldmpz almost-equal-to 4-Brdmpz almost-equal-to 4-Hdmpz.}, keywords = {cobalt(II), CRYSTAL, MOLECULAR-STRUCTURE}, isbn = {0008-4042}, url = {://A1993MC95700020}, author = {Ehlert, M. K. and Storr, A. and Thompson, R. C.} } @article {2792, title = {METAL PYRAZOLATE POLYMERS .4. SYNTHESIS, CHARACTERIZATION, AND MAGNETIC-PROPERTIES OF [CO(PZ-ASTERISK)2]X COMPLEXES (WHERE PZ-ASTERISK = PYRAZOLATE, 3-METHYLPYRAZOLATE, AND 4-SUBSTITUTED 3,5-DIMETHYLPYRAZOLATE)}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {71}, number = {9}, year = {1993}, note = {ISI Document Delivery No.: MC957Times Cited: 20Cited Reference Count: 32}, month = {Sep}, pages = {1412-1424}, type = {Article}, abstract = {The title compounds were prepared and characterized by X-ray powder diffraction, scanning electron microscopy, vibrational and electronic spectroscopy, and magnetic susceptibility measurements. Indirect evidence supports polymeric one-dimensional chain structures involving double pyrazolate bridges linking pseudo-tetrahedrally coordinated metal centres in all six compounds. The spectroscopic studies indicate a greater degree of distortion of the CoN4 chromophore from regular stereochemistry in the 4-substituted 3,5-dimethylpyrazolate complexes. The magnetic studies reveal anisotropy in the susceptibilities and the presence of significant antiferromagnetic exchange. Magnetic modelling employing both Ising and Heisenberg models suggests the exchange behaviour is probably of the Heisenberg type with zero-field splitting effects producing Ising-like exchange at low temperatures. The derived J values (approximately -2 to -6 cm-1) have been used to qualitatively rank the magnitude of exchange as follows: 4-Hpz almost-equal-to 3-Mepz >> 4-Medmpz almost-equal-to 4-Cldmpz almost-equal-to 4-Brdmpz almost-equal-to 4-Hdmpz.}, keywords = {cobalt(II), CRYSTAL, MOLECULAR-STRUCTURE}, isbn = {0008-4042}, url = {://A1993MC95700020}, author = {Ehlert, M. K. and Storr, A. and Thompson, R. C.} } @article {2785, title = {REACTIONS OF 16-ELECTRON CP{\textquoteright}M(NO)R2 COMPOUNDS [M = MO, W R = ALKYL, ARYL] WITH CARBON-MONOXIDE}, journal = {Organometallics}, volume = {12}, number = {6}, year = {1993}, note = {ISI Document Delivery No.: LG158Times Cited: 14Cited Reference Count: 28}, month = {Jun}, pages = {2085-2093}, type = {Article}, abstract = {{This paper reports the reactions of 16-electron Cp{\textquoteright}M(NO)R2 complexes [Cp{\textquoteright} = CP (eta5-C5H5), Cp* (eta5-C5Me5); M = Mo, W; R = alkyl, aryl] with carbon monoxide. The reactions proceed in a stepwise fashion, and their outcomes are dependent on both the natures of Cp{\textquoteright} and R and the experimental conditions employed. Thus, treatment of solutions of Cp{\textquoteright}W(NO)R2 with CO under ambient conditions affords the corresponding 18-electron monoacyl species Cp{\textquoteright}W(NO)-(eta2-C{O}R) (R) (Cp{\textquoteright} = Cp*}, keywords = {COORDINATION, CRYSTAL, ETA-2-ACYL COMPLEXES, MOLYBDENUM, ORGANOMETALLIC NITROSYL CHEMISTRY, TUNGSTEN}, isbn = {0276-7333}, url = {://A1993LG15800019}, author = {Dryden, N. H. and Legzdins,Peter and Lundmark, P. J. and Riesen, A. and Einstein, F. W. B.} } @article {2700, title = {STRUCTURAL STUDIES OF ORGANOBORON COMPOUNDS .57. SYNTHESIS AND STRUCTURE OF BICYCLIC BORON-NITROGEN BETAINES - 1-METHYL-5-(3-NITROPHENYL)-4,6,9-TRIOXA-1-AZONIA-5-BORATABICYCLO[3.3.1]N ONANE AND 3,3,4-TRIMETHYL-1-(3-NITROPHENYL)-2,6,7-TRIOXA-3-AZONIA-1-BOR}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {71}, number = {2}, year = {1993}, note = {ISI Document Delivery No.: KR853Times Cited: 3Cited Reference Count: 33}, month = {Feb}, pages = {263-271}, type = {Article}, abstract = {{The syntheses an structures of the bicyclic boron-nitrogen betaines 1-methyl-5-(3-nitrophenyl)-4,6,9-trioxa-1-azonia-5-boratabicyclo[3.3.1]n onane, 7a, and 3,3,4-trimethyl-l-(3-nitrophenyl)-2,6,7-trioxa-3-azonia-1-boratabicyclo[ 2.2.2]-octane, 14a, are reported. Crystals of 7a are orthorhombic}, keywords = {CRYSTAL}, isbn = {0008-4042}, url = {://A1993KR85300018}, author = {Ahlenstiel, E. and Kliegel, W. and Rettig, S. J. and Trotter, J.} } @article {2842, title = {STRUCTURAL STUDIES OF ORGANOBORON COMPOUNDS .63. 4-(1{\textquoteright}-AZONIABICYCLO[2.2.2]-OCTANYL)-2,2-DIPHENYL-2-BORATA-1,3-DIOXA-1,2, 3,4-TETRAHYDRONAPHTHALENE}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {71}, number = {6}, year = {1993}, note = {ISI Document Delivery No.: LM299Times Cited: 6Cited Reference Count: 21}, month = {Jun}, pages = {919-923}, type = {Article}, abstract = {{Two synthetic routes leading to 4-(1{\textquoteright}-azoniabicyclo[2.2.2]octanyl)-2,2-diphenyl-2-borata-1,3-dioxa-1,2,3 ,4-tetrahydronaphthalene, 5, are described. Crystals of the product are orthorhombic}, keywords = {CRYSTAL, MOLECULAR-STRUCTURES}, isbn = {0008-4042}, url = {://A1993LM29900023}, author = {Kliegel, W. and Druckler, K. and Rettig, S. J. and Trotter, J.} } @article {7251, title = {BIS(DIPHENYLPHOSPHINO)METHANE COMPLEXES OF PALLADIUM AS CATALYSTS FOR HYDROSILYLATION OF OLEFINS BY TRICHLOROSILANE}, journal = {Journal of Molecular Catalysis}, volume = {72}, number = {2}, year = {1992}, note = {ISI Document Delivery No.: HT940Times Cited: 5Cited Reference Count: 22}, month = {Mar}, pages = {167-171}, type = {Article}, abstract = {Mononuclear Pd(II), and dinuclear Pd(O) and Pd(I) complexes containing bis(diphenylphosphino)methane catalyze the addition of trichlorosilane to the olefinic bond of hexene-1, styrene and vinyltrichlorosilane. Activity relationships for limited data at 80 and 120-degrees-C suggest that in each case mononuclear Pd(O) species might act as a catalyst precursor.}, keywords = {BOND, CRYSTAL, HYDROGEN-SULFIDE, INSERTION, metal complexes, Pd(I), PHOSPHINE COMPLEXES}, isbn = {0304-5102}, url = {://A1992HT94000006}, author = {Gulinski, J. and James, Brian R.} } @article {7210, title = {FERROCYNE AND FERRODICYNE - PREPARATION AND STRUCTURES OF OS3(CO)9[MU-3-(C5H3)FE(C5H5)][MU-3-P(C5H4)FE(C5H5)], OS3(H)2(CO)8(PPRI2C5H2)FE(C5H2PPRI2)OS3(H)2(CO)8, AND OS3(CO)9[MU-3-C6H4][MU-3-P(C5H4)FE(C5H5)]}, journal = {Organometallics}, volume = {11}, number = {2}, year = {1992}, note = {ISI Document Delivery No.: HE298Times Cited: 32Cited Reference Count: 27}, month = {Feb}, pages = {928-935}, type = {Article}, abstract = {{The thermolysis of Os3(CO)11PPhFc2 affords Os3(CO)9[mu(3)-aryne][mu(3)-P(C5H4)Fe(C5H5)] (aryne = ferrocyne, (C5H3)Fe(C5H5) (2), benzyme, C6H4 (6)). Likewise the ferrodicyne Fe(C5H3)2 derivative Os3(H)2(CO)8-(PPr2iC5H2)Fe(C5H2PPr2i)Os3(H)2(CO)8 (3) is obtained from Os3(CO)11(PPr2iC5H4)Fe(C5H4PPr2i)Os3(CO)11. In 2 the ferrocyne moiety is a symmetrical four-electron donor to an open Os3P cluster; in 6 the benzyne is an unsymmetrical donor of two to four electrons to the open Os3P cluster. In 3 each aryne ring acts as an unsymmetrical four-electron donor to a closed Os3 cluster that is also coordinated to the PPr2i group of the other aryne ring. Crystal data for 2.0.5CH2Cl2: triclinic, P1BAR}, keywords = {BENZYNE, CLUSTERS, COMPLEXES, COORDINATION, CRYSTAL, MOLECULAR-STRUCTURE}, isbn = {0276-7333}, url = {://A1992HE29800064}, author = {Cullen, W. R. and Rettig, S. J. and Zheng, T. C.} } @article {7243, title = {THE MOLECULAR AND ELECTRONIC-STRUCTURE OF 1-PYRAZOLYLPHOSPHAZENES}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {70}, number = {6}, year = {1992}, note = {ISI Document Delivery No.: JR097Times Cited: 1Cited Reference Count: 62}, month = {Jun}, pages = {1855-1868}, type = {Article}, abstract = {{The nature of the interactions between pyrazolyl and phosphazene rings has been investigated through the study of the structures of bis(1-pyrazolyl)methane, CH2(H2pz)2, 1, bis[1-(3,5-dimethylpyrazolyl)]methane, CH2(Me2pz)2, 2, the pyrazolylphosphazenes N3P3(Me2pz)6, 3, N4P4(H2pz)8, 4, and N4P4(Me2pz)8, 5, and the partially substituted gem-N3P3Ph2(Me2pz)4, 6. Crystal data are as follows: 1, orthorhombic, P2(1)2(1)2(1)}, keywords = {COMPLEXES, CRYSTAL, CYCLOPHOSPHAZENES, CYCLOTRIPHOSPHAZENE, DIFFRACTION, PHOSPHAZENES, PHOSPHONITRILIC DERIVATIVES, PYRAZOLE, SPECTRA, SUBSTITUENTS}, isbn = {0008-4042}, url = {://A1992JR09700038}, author = {Gallicano, K. D. and Paddock, N. L. and Rettig, S. J. and Trotter, J.} } @article {7389, title = {MONONUCLEAR AND DINUCLEAR PALLADIUM COMPLEXES CONTAINING 2-PYRIDYLPHOSPHINE LIGANDS, INCLUDING X-RAY CHARACTERIZATION OF PD2I2(MU-PPH2PY)2 AND A DIMETHYLACETYLENEDICARBOXYLATE A-FRAME COMPLEX PD2CL2(MU-PPY3)2(MU-MEO2C.C=C.CO2ME) PY = 2-PYRIDYL}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {70}, number = {3}, year = {1992}, note = {ISI Document Delivery No.: JD670Times Cited: 41Cited Reference Count: 48}, month = {Mar}, pages = {751-762}, type = {Article}, abstract = {{Dibromo- and diiodo[(2-pyridyl)phosphine]palladium(II) complexes are prepared by metathesis of cis-PdCl2(PPh3-npyn)2 species (n = 1-3) using the appropriate sodium halide; py = 2-pyridyl. NMR spectroscopy, particularly C-13{H-1}, is used to distinguish cis and trans isomers. The dinuclear complexes Pd2X2(mu-PPh3-npyn)2}, keywords = {(DINUCLEAR), 2-(DIPHENYLPHOSPHINO)PYRIDINE, BINUCLEAR COMPLEXES, bis(diphenylphosphino)methane, BRIDGING, CHEMISTRY, CRYSTAL, DIMETHYLACETYLENEDICARBOXYLATE ADDUCTS, hydration, LIGAND, MOLECULAR-STRUCTURE, palladium complexes, pyridylphosphines, RHODIUM COMPLEXES, RUTHENIUM(II)}, isbn = {0008-4042}, url = {://A1992JD67000009}, author = {Xie, Y. and Lee, C. L. and Yang, Y. P. and Rettig, S. J. and James, Brian R.} } @article {7234, title = {REACTIONS OF NITRILES WITH BINUCLEAR RHODIUM HYDRIDES - THE STEPWISE REDUCTION OF A CARBON NITROGEN TRIPLE BOND AT 2 METAL CENTERS}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {70}, number = {9}, year = {1992}, note = {ISI Document Delivery No.: JW978Times Cited: 14Cited Reference Count: 29}, month = {Sep}, pages = {2381-2389}, type = {Article}, abstract = {{The reaction of simple nitriles, R{\textquoteright}CN (R{\textquoteright} = CH3, Ph, o-tol) with the electron-rich binuclear rhodium hydride derivatives [(R2PCH2CH2PR2)Rh]2(mu-H)2 (R = Pr(i): [(dippe) Rh]2(mu-H)2: R = OPri: [(dipope)Rh]2(mu-H)2) results in the formation of alkylideneimido derivatives [(R2PCH2CH2PR2)Rh]2(mu-H)(mu-N=CHR{\textquoteright}), apparently by insertion of the nitrile moiety into a bridging hydride bond: this was confirmed by the reaction of nitriles with the dideuteride [(dippe)Rh]2(mu-D)2, which resulted in the formation of [(dippe)Rh]2(mu-D)(mu-N=CHR{\textquoteright}). Further reduction can take place by addition of H-2 to generate the corresponding amide hydride derivatives [(dippe)Rh]2(mu-H)(mu-NHCH2R{\textquoteright}); this represents an overall stoichiometric reduction of a nitrile to a coordinated amide at a binuclear centre. These same amido-hydride complexes can be accessed by addition of amine to the starting binuclear rhodium hydride derivatives. The X-ray structure of [(Pri2PCH2CH2PPri2)Rh]2(mu-H)(mu-N=CHCH3) was undertaken to confirm the structure of these particular intermediates. Crystals of this material are monoclinic}, keywords = {ACIMIDOYL, CATALYTIC-HYDROGENATION, cluster complexes, CRYSTAL, LIGANDS, REACTIVITY}, isbn = {0008-4042}, url = {://A1992JW97800008}, author = {Fryzuk,Michael D. and Piers, W. E. and Rettig, S. J.} } @article {7197, title = {SOLID-STATE P-31 NMR INVESTIGATIONS OF UNSATURATED PHOSPHORUS NITROGEN SULFUR RINGS}, journal = {Magnetic Resonance in Chemistry}, volume = {30}, number = {12}, year = {1992}, note = {ISI Document Delivery No.: KA993Times Cited: 3Cited Reference Count: 20}, month = {Dec}, pages = {1220-1223}, type = {Article}, abstract = {Solid-state CP/MAS P-31 NMR spectra were measured for the following unsaturated phosphorus-nitrogen-sulfur ring systems: 1,5-R4P2N4S2 (R = Me, Et, Ph), 1,5-Ph4P2N4S2Ph2, Ph2PN4S3NPPH3 and Ph2PN3S2. The isotropic solid-state shifts correlate well with the corresponding shifts in solution, the largest difference being 9.0 ppm, indicating that there are no phase-dependent structural features. Analysis of the principal elements of the shielding tensor by the spinning side band method showed that one of these elements is primarily responsible for the anomalously low-field isotropic chemical shifts of 1,5-R4P2N4S2, but no correlation was found between this individual tensor component and any of the structural parameters of these folded eight-membered rings. Two isotropic shifts were observed for the crystallographically inequivalent phosphorus atoms of 1,5-Et4P2N4S2, but the individual P-31 isotropic shifts of 1,5-Me4P2N4S2 were not resolved.}, keywords = {1, 5-DIPHOSPHADITHIATETRAZOCINES, BOND, CRYSTAL, ELECTRONIC-STRUCTURES, MAGIC ANGLE, PHOSPHORUS NITROGEN SULFUR RINGS, SOLID-STATE P-31 NMR, SPECTROSCOPY}, isbn = {0749-1581}, url = {://A1992KA99300010}, author = {Chivers, T. and Edwards, M. and Fyfe, C. A. and Randall, L. H.} } @article {7281, title = {STRUCTURAL STUDIES OF ORGANOBORON COMPOUNDS .50. 4-(2-HYDROXY-2,2-DIPHENYLACETYL)-6,6-PENTAMETHYLENE-2-PHENYL-1,3-DIOXA-4 -AZA-2-BORACYCLOHEXANE AND 4-[2,2-DIFLUORO-5,5-BIS(4-METHOXYPHENYL)-1,3-DIOXA-2-BORATA-4-CYCLOPENTY LIDENE]-6,6-PENTAMETHYLENE-2-PHEN}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {70}, number = {4}, year = {1992}, note = {ISI Document Delivery No.: JH895Times Cited: 7Cited Reference Count: 53}, month = {Apr}, pages = {1176-1187}, type = {Article}, abstract = {{The preparation of the organoboron compounds 4-(2-hydroxy-2,2-diphenylacetyl)-6,6-pentamethylene-2-phenyl-1,3-dioxa-4 -aza-2-boracyclohexane, 6, 4-(2,2-difluoro-5,5-diphenyl-1,3-dioxa-2-borata-4-cyclopentylidene)-6,6- pentamethylene-2-phenyl-1,3,-dioxa-4-azonia-2-boracyclohexane, 14a, and 4-[2,2-difluoro-5,5-bis(4-methoxyphenyl)-1,3-dioxa-2-borata-4-cyclopenty lidene]-6,6-pentamethylene-2-phenyl-1,3-dioxa-4-azonia-2-boracyclohexane , 14b, are reported. Crystals of 6 are triclinic, P1BAR}, keywords = {ADJACENT ACYL LIGANDS, CARBON BOND FORMATION, COORDINATED MOLECULES, CRYSTAL, HYDROXAMIC ACIDS, LENGTHS, RING}, isbn = {0008-4042}, url = {://A1992JH89500021}, author = {Kliegel, W. and Preu, L. and Schumacher, U. and Rettig, S. J. and Trotter, J.} } @article {7282, title = {STRUCTURAL STUDIES OF ORGANOBORON COMPOUNDS .51. N-METHYLHYDROXYLAMINE(O-B)2,5-DIPHENYL-1,3,2-DIOXABOROLAN-4-ONE}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {70}, number = {4}, year = {1992}, note = {ISI Document Delivery No.: JH895Times Cited: 7Cited Reference Count: 43}, month = {Apr}, pages = {1188-1194}, type = {Article}, abstract = {{Three synthetic methods for the preparation of N-methylhydroxylamine(O-B)2,5-diphenyl-1,3,2-dioxaborolan-4-one (2-(1-oxa-2-azoniapropyl)-2,5-diphenyl-1,3-dioxa-2-boratacyclopentan-4-o ne), 9, in good yield are described. Crystals of this material are triclinic}, keywords = {ACTIVATION, CRYSTAL, DERIVATIVES, HYDROXAMIC ACIDS, HYDROXYLAMINE, MODEL REACTIONS, MONOCYCLIC AROMATIC-AMINES, N-ARYL-O-(ALPHA-AMINOACYL)HYDROXYLAMINES, PHENACETIN, ULTIMATE CARCINOGENS}, isbn = {0008-4042}, url = {://A1992JH89500022}, author = {Kliegel, W. and Schumacher, U. and Rettig, S. J. and Trotter, J.} } @article {7280, title = {STRUCTURAL STUDIES OF ORGANOBORON COMPOUNDS .55. N,N{\textquoteright}-DI-TERT-BUTYL-N,N{\textquoteright}-DIHYDROXYPROPANE-1,3-DIAMINE(O-B)ETHOXYDIPHENYLB ORANE2 AND N1,N2-DI-TERT-BUTYL-N1,N2-DIHYDROXY-1-PHENYLPROPANE-1,3-DIAMINE(N2-O-B)H YDROXYDIPHENYLBORANE}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {70}, number = {7}, year = {1992}, note = {ISI Document Delivery No.: JU753Times Cited: 7Cited Reference Count: 14}, month = {Jul}, pages = {2033-2039}, type = {Article}, abstract = {{The 1,3-propanediamine derivatives N,N{\textquoteright}-di-tert-butyl-N,N{\textquoteright}-dihydroxy- 1,3-propanediamine and N,N{\textquoteright}-di-tert-butyl-N,N{\textquoteright}-dihydroxy-1-phenyl-1,3-propanediamine have been prepared and reacted with oxybis(diphenylborane) to yield, respectively, the crystalline organoboron compounds N,N{\textquoteright}-di-tert-butyl-N,N{\textquoteright}-dihydroxypropane-1,3-diamine(O-B)ethoxydiphenylb orane, 5a, and N1,N2-di-tert-butyl-N1,N 2-dihydroxy-1-phenylpropane-1,3-diamine(N2-O-B)-hydroxydiphenylborane, 5b. Crystals of 5a are monoclinic, C2/c}, keywords = {CRYSTAL, MOLECULAR-STRUCTURES}, isbn = {0008-4042}, url = {://A1992JU75300023}, author = {Kliegel, W. and Lubkowitz, G. and Rettig, S. J. and Trotter, J.} } @article {7276, title = {STRUCTURAL STUDIES OF ORGANOBORON COMPOUNDS .56. 1-BENZYL-7-METHYL-3,5-DIPHENYL-2,4,6-TRIOXA-1-AZONIA-3-BORA-5-BORATABICY CLO[3.3.0]OCTANE AND 1,4,6,9-TETRAMETHYL-2,7-DIPHENYL-3,8,11,12-TETRAOXA-1,6-DIAZONIA-2,7-DIB ORATATRICYCLO[5.3.1.1(2,6)]DODECANE}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {70}, number = {11}, year = {1992}, note = {ISI Document Delivery No.: KC742Times Cited: 13Cited Reference Count: 31}, month = {Nov}, pages = {2809-2817}, type = {Article}, abstract = {{The preparation of the N-(2-hydroxypropyl)-N-alkylhydroxylamines, 6a (R = CH3) and 6b (R = CH2Ph), and their reactions with phenylboronic acid are described. Regardless of the molar ratios of reactants employed, the reaction with 6b leads to the 1:2 condensate 1-benzyl-7-methyl-3,5-diphenyl-2,4,6-trioxa-1-azonia-3-bora-5-boratabicy clo[3.3.0]octane, 7, while that with 6a gives rise to the 1:1 condensate 1,4,6,9-tetramethyl-2,7-diphenyl-3,8,11,12-tetraoxa-1,6-diazonia-2,7-dib oratatricyclo[5.3.1.1(2,6)]dodecane, 11 (the cyclic BONBON dimer of 4,6-dimethyl-2-phenyl-1,3-dioxa-4-aza-2-boracyclohexane, 9). Compounds 7 and 11 both crystallize in the triclinic space group P1BAR: for 7; a = 13.126(1)}, keywords = {C-H...O, CRYSTAL, MOLECULAR-STRUCTURE}, isbn = {0008-4042}, url = {://A1992KC74200017}, author = {Kliegel, W. and Lubkowitz, G. and Rettig, S. J. and Trotter, J.} } @article {7220, title = {STRUCTURE AND MAGNETIC-PROPERTIES OF MONOPHENYLPHOSPHINATE BRIDGED CHAIN POLYMERS OF MANGANESE(II), [MNL2(HPHPO2)2]X (WHERE L = HPHPO2H, CH3CONH2, H2O, HCONH(CH3), AND C5H5N)}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {70}, number = {3}, year = {1992}, note = {ISI Document Delivery No.: JD670Times Cited: 7Cited Reference Count: 19}, month = {Mar}, pages = {732-741}, type = {Article}, abstract = {{Crystals of Mn(CH3CONH2)2(HPhPO2)2 are monoclinic}, keywords = {ANTIFERROMAGNETIC EXCHANGE, cobalt(II), CRYSTAL, crystal structures, MAGNETIC PROPERTIES, POLYMERIC MANGANESE MONOPHENYLPHOSPHINATES}, isbn = {0008-4042}, url = {://A1992JD67000007}, author = {Du, J. L. and Rettig, S. J. and Thompson, R. C. and Trotter, J. and Betz, P. and Bino, A.} } @article {7220, title = {STRUCTURE AND MAGNETIC-PROPERTIES OF MONOPHENYLPHOSPHINATE BRIDGED CHAIN POLYMERS OF MANGANESE(II), [MNL2(HPHPO2)2]X (WHERE L = HPHPO2H, CH3CONH2, H2O, HCONH(CH3), AND C5H5N)}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {70}, number = {3}, year = {1992}, note = {ISI Document Delivery No.: JD670Times Cited: 7Cited Reference Count: 19}, month = {Mar}, pages = {732-741}, type = {Article}, abstract = {{Crystals of Mn(CH3CONH2)2(HPhPO2)2 are monoclinic}, keywords = {ANTIFERROMAGNETIC EXCHANGE, cobalt(II), CRYSTAL, crystal structures, MAGNETIC PROPERTIES, POLYMERIC MANGANESE MONOPHENYLPHOSPHINATES}, isbn = {0008-4042}, url = {://A1992JD67000007}, author = {Du, J. L. and Rettig, S. J. and Thompson, R. C. and Trotter, J. and Betz, P. and Bino, A.} } @article {7205, title = {AN UNPRECEDENTED DERIVATIVE OF BENZYNECHROMIUM TRICARBONYL, RU3(CO)8[MU-3-C6H4CR(CO)3][MU-3-PBU-TERT]}, journal = {Organometallics}, volume = {11}, number = {2}, year = {1992}, note = {ISI Document Delivery No.: HE298Times Cited: 14Cited Reference Count: 13}, month = {Feb}, pages = {1000-1002}, type = {Note}, abstract = {{The reaction of Ru3(CO)12 with P[C6H5Cr-(CO)3]2Bu(t) affords the benzynechromium tricarbonyl derivative Ru3(CO)8[mu3-C6H4Cr(CO)3][mu(3)-PBu(t)] (5). The aryne is bound symmetrically to the closed Ru3 cluster, and the eta(2)-bound carbon atoms are four-electron donors. In addition, there is a Ru {\textendash}> Cr bond of length 2.920 (1) angstrom. 5: monoclinic, P2(1)/a}, keywords = {CRYSTAL}, isbn = {0276-7333}, url = {://A1992HE29800082}, author = {Cullen, W. R. and Rettig, S. J. and Zhang, H. L.} } @article {6998, title = {(BENZYNE)CHROMIUM TRICARBONYL - PREPARATION AND STRUCTURE OF RU3(CO)9(MU-3-P[C6H5CR(CO)3])[MU-3-C6H4CR(CO)3] AND RU3(CO)7(MU-3-C6H4)(MU-PPH[C6H5CR(CO)3])2}, journal = {Organometallics}, volume = {10}, number = {8}, year = {1991}, note = {ISI Document Delivery No.: GA275Times Cited: 19Cited Reference Count: 8}, month = {Aug}, pages = {2965-2969}, type = {Note}, abstract = {{Ru3(CO)9{mu-3-P[C6H5Cr(CO)3]}[mu-3-C6H4Cr(CO)3] (2) is prepared by reacting Ru3(CO)12 with PhP[C6H5Cr-(CO)3]2. The crystal structure shows the aryne moiety, C6H4Cr(CO)3, eta-2 bound to three Ru atoms that are part of a Ru3P butterfly arrangement. A Cr {\textendash}> Ru bond is proposed. The P atom is bound to the C6H5Cr(CO)3 moiety and three Ru atoms. In contrast, the product of the thermal decomposition of Ru3(CO)11PPh2[C6H5Cr(CO)3] is the mu-3-eta-2-benzyne complex Ru3(CO)7(mu-3-eta-2-C6H4){mu-PPh-[C6H5Cr(CO)3]}2 (3). Crystals of 2 are monoclinic, with a = 16.918 (2) angstrom}, keywords = {CLUSTER CHEMISTRY, CONVERSION, CRYSTAL, MOLECULAR-STRUCTURES, OS3(CO)11(PMPHE2), OS3(CO)11(PPHPH2), OS3(MU-3-C6H4)(MU-3-PR)(CO)9, OS3(MU-3-C6H4PME-O)(CO)10, OS3-(MU-H)(MU-3-C6H4PMEPH-O)(CO)9}, isbn = {0276-7333}, url = {://A1991GA27500078}, author = {Cullen, W. R. and Rettig, S. J. and Zhang, H. L.} } @article {6969, title = {HEPTADENTATE LIGANDS FOR THE LANTHANIDES - THE 1ST STRUCTURALLY CHARACTERIZED EXAMPLE OF A LANTHANIDE HEPTADENTATE LIGAND COMPLEX - (TRIS(3-AZA-4-METHYL-6-OXOHEPT-4-EN-1-YL)AMINE)YTTERBIUM(III)}, journal = {Journal of the American Chemical Society}, volume = {113}, number = {7}, year = {1991}, note = {ISI Document Delivery No.: FD837Times Cited: 55Cited Reference Count: 29}, month = {Mar}, pages = {2528-2532}, type = {Article}, abstract = {{Several binary heptacoordinate-N4O3-ligand LnL complexes of the lanthanides have been prepared and characterized. The heptadentate ligands are the Schiff base condensation products of tris(2-aminoethyl)amine with 3 equiv of either acetylacetone (to form H-3trac) or a hydroxyacetophenone (to form H-3hatren or H-3datren). The complexes hydrolyze easily but most of the Ln(trac) complexes are stable enough to sublime. Crystals of Yb(trac) were isolated by sublimation, and its structure has been solved; it is the first structurally characterized example of a lanthanide heptadentate ligand complex. Crystals of Yb(trac) are monoclinic}, keywords = {AGENTS, COORDINATION CHEMISTRY, CRYSTAL, MOLECULAR-STRUCTURE}, isbn = {0002-7863}, url = {://A1991FD83700029}, author = {Berg, D. J. and Rettig, S. J. and Orvig, Chris} } @article {7019, title = {NATURE OF THE CATALYTICALLY INACTIVE COBALT HYDRIDE FORMED UPON HYDROGENATION OF AROMATIC SUBSTRATES - STRUCTURE AND CHARACTERIZATION OF THE BINUCLEAR COBALT HYDRIDE [(PRI2P(CH2)3PPRI2)CO]2(H)(MU-H)3}, journal = {Inorganic Chemistry}, volume = {30}, number = {10}, year = {1991}, note = {ISI Document Delivery No.: FM296Times Cited: 6Cited Reference Count: 28}, month = {May}, pages = {2437-2441}, type = {Note}, keywords = {COMPLEXES, CRYSTAL, MOLECULAR-STRUCTURE, ORGANOMETALLIC COMPOUNDS, RADICAL-ANION, rhodium, STATE}, isbn = {0020-1669}, url = {://A1991FM29600039}, author = {Fryzuk,Michael D. and Ng, J. B. and Rettig, S. J. and Huffman, J. C. and Jonas, K.} } @article {7004, title = {ORGANOMETALLIC NITROSYL CHEMISTRY .45. IMPROVED SYNTHESES OF CYCLOPENTADIENYL DICHLORO NITROSYL COMPLEXES OF MOLYBDENUM AND TUNGSTEN - UTILITY OF PHOSPHORUS-PENTACHLORIDE AS A CHLORINATING AGENT}, journal = {Organometallics}, volume = {10}, number = {6}, year = {1991}, note = {ISI Document Delivery No.: FQ933Times Cited: 33Cited Reference Count: 30}, month = {Jun}, pages = {2077-2081}, type = {Note}, abstract = {Treatment of Cp{\textquoteright}M(NO)(CO)2 (Cp{\textquoteright} = Cp (eta-5-C5H5) or Cp* (eta-5-C5Me5); M = Mo or W) with an equimolar amount of PCl5 in Et2O at 20-degrees-C results in the efficient, high-yield (80-95 \%) syntheses of the corresponding [Cp{\textquoteright}M(NO)Cl2]2 complexes. The product complexes have been fully characterized by conventional analytical and spectroscopic methods, including a single-crystal X-ray crystallographic analysis of [Cp*Mo(NO)Cl2]2, which reveals a dimeric molecular configuration, the piano-stool monomers being linked through bridging chlorine atoms.}, keywords = {16-ELECTRON COMPLEX, CHEMICAL-PROPERTIES, CRYSTAL, ETA-5-C5H5, LIGANDS, MO}, isbn = {0276-7333}, url = {://A1991FQ93300067}, author = {Dryden, N. H. and Legzdins,Peter and Batchelor, R. J. and Einstein, F. W. B.} } @article {7020, title = {REACTIONS OF SILANES WITH THE BINUCLEAR HYDRIDE [(PR(I)2PCH2CH2PPR(I)2)RH]2(MU-H)2 - CATALYTIC DEUTERIUM-EXCHANGE ON DIPHENYLSILANE AND X-RAY STRUCTURE OF [(PR(I)2PCH2CH2PPR(I)2)RH]2(MU-H)(MU-ETA-2-HSIPH2)}, journal = {Organometallics}, volume = {10}, number = {8}, year = {1991}, note = {ISI Document Delivery No.: GA275Times Cited: 45Cited Reference Count: 25}, month = {Aug}, pages = {2537-2539}, type = {Note}, abstract = {Stoichiometric reactions of diphenylsilane (H2SiPh2) with [(dippe)Rh]2(mu-H)2 (1; dippe = 1,2-bis(diisopropylphosphino)ethane) have produced the new compounds [(dippe)Rh]2(mu-H)(mu-eta-2-HSiPh2) (2) and [(dippe)-Rh]2(mu-SiPh2)2 (3). An X-ray structure determination of 2 indicates the presence of a three-center, two-electron Rh-Si-H interaction. Deuterium exchange and silicon-silicon coupling to give 1,1,2,2-tetraphenyldisilane are both observed for diphenylsilane in the presence of catalytic amounts of 1; the isolated silyl-dihydride complex 2 and the bis(silylene) derivative 3 are likely to be active in these catalytic cycles.}, keywords = {BONDS, CRYSTAL, HYDROSILATION, MOLECULAR-STRUCTURE, MU-SILYLENE COMPLEXES, POLYMERIZATION, PRIMARY ORGANOSILANES, SI, SILICON}, isbn = {0276-7333}, url = {://A1991GA27500005}, author = {Fryzuk,Michael D. and Rosenberg, L. and Rettig, S. J.} } @article {7049, title = {STRUCTURAL STUDIES OF ORGANOBORON COMPOUNDS .42. 4,6-BIS(1-CYANO-1-METHYLETHYL)-2-MESITYL-1,3-DIOXA-4,6-DIAZA-2-BORACYCLO HEXANE}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {69}, number = {2}, year = {1991}, note = {ISI Document Delivery No.: FA876Times Cited: 9Cited Reference Count: 28}, month = {Feb}, pages = {234-238}, type = {Article}, abstract = {{The condensation of N,N{\textquoteright}-bis(1-cyano-1-methylethyl)-N,N{\textquoteright}-dihydroxymethanediamine and mesitylboronic acid gives 4,6-bis(1-cyano-1-methylethyl)-2-mesityl-1,3-dioxa-4,6-diaza-2-boracyclo hexane in good yield. Crystals of the latter compound are orthorhombic}, keywords = {BORON COMPOUND, CONFORMATION, CRYSTAL, crystal structure, organoboron compound}, isbn = {0008-4042}, url = {://A1991FA87600010}, author = {Kliegel, W. and Lubkowitz, G. and Rettig, S. J. and Trotter, J.} } @article {7053, title = {STRUCTURAL STUDIES OF ORGANOBORON COMPOUNDS .43. 4-[(1-HYDROXYCYCLOHEXYL)METHYL]-2,2,5-TRIPHENYL-1,3-DIOXA-4-AZONIA-2-BOR ATA-4-CYCLOPENTENE}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {69}, number = {3}, year = {1991}, note = {ISI Document Delivery No.: FE808Times Cited: 7Cited Reference Count: 23}, month = {Mar}, pages = {545-549}, type = {Article}, abstract = {{The reaction of N{\textquoteright}-hydroxy-N-[1-hydroxycyclohexyl)methyl]benzamide and diphenylborinic anhydride gives 4-[(1-hydroxycyclohexyl)methyl]-2,2,5-triphenyl-1,3-dioxa-4-azonia-2-bor ata-4-cyclopentene in nearly quantitative yield. Crystals of the product are monoclinic}, keywords = {BOND LENGTHS RELATIONS, BORON COMPOUND, CN-BONDS, CO-BONDS, CRYSTAL, crystal structure, HETERO-PI-SYSTEMS, MOLECULAR-STRUCTURES, organoboron compound}, isbn = {0008-4042}, url = {://A1991FE80800027}, author = {Kliegel, W. and Schumacher, U. and Tajerbashi, M. and Rettig, S. J. and Trotter, J.} } @article {7054, title = {STRUCTURAL STUDIES OF ORGANOBORON COMPOUNDS .44. 2,3-DIHYDRO-3-HYDROXY-2,2-TETRAMETHYLENE-4H-BENZOXAZIN-4-ONE AND ITS DIFLUOROBORON CHELATE, 2,2-DIFLUORO-4,4-TETRAMETHYLENE-1,3,5-TRIOXA-3A-AZONIA-2-BORATA-2,3,4,5- TETRAHYDRO-1H-CYCLOPENTA[A]NAPHTHALENE}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {69}, number = {4}, year = {1991}, note = {ISI Document Delivery No.: FL979Times Cited: 4Cited Reference Count: 28}, month = {Apr}, pages = {673-680}, type = {Article}, abstract = {{The reaction of 2,3-dihydro-3-hydroxy-2,2-tetramethylene-4H-benzoxazin-4-one, 2, and diethyl ether-boron trifluoride yields the difluoroboron chelate 2,2-difluoro-4,4-tetramethylene-1,3,5-trioxa-3a-azonia-2-borata-2,3,4,5- tetrahydro-1H-cyclopenta[a]naphthalene, 6, in high yield. There are two crystal forms of 2: 2a, triclinic, P1BAR}, keywords = {ADJACENT ACYL LIGANDS, ANALOGS, BORON COMPOUND, CARBON BOND FORMATION, COMPLEXES, COORDINATED MOLECULES, CRYSTAL, crystal structure, organoboron compound, RING}, isbn = {0008-4042}, url = {://A1991FL97900014}, author = {Kliegel, W. and Tajerbashi, M. and Rettig, S. J. and Trotter, J.} } @article {7052, title = {STRUCTURAL STUDIES OF ORGANOBORON COMPOUNDS .45. 5,5-DIFLUORO-2,2-PENTAMETHYLENE-7,7-DIPHENYL-1,4,6-TRIOXA-3A-AZONIA-5-BO RATA-2,3,4,5,6,7-HEXAHYDROINDENE}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {69}, number = {4}, year = {1991}, note = {ISI Document Delivery No.: FL979Times Cited: 5Cited Reference Count: 26}, month = {Apr}, pages = {681-686}, type = {Article}, abstract = {{The reaction of N,2-dihydroxy-N-(1-hydroxycyclohexyl)methyl-2,2-diphenylacetamide with dimethyl ether-boron trifluoride gives 5,5-difluoro-2,2-pentamethylene-7,7-diphenyl-1,4,6-trioxa-3a-azonia-5-bo rata-2,3,4,5,6,7-hexahydroindene in nearly quantitative yield. Crystals of the product are triclinic}, keywords = {ACIDS, BOND LENGTHS, BORON COMPOUND, CRYSTAL, crystal structure, MOLECULAR-STRUCTURE, NITRONES, organoboron compound, OXAZOLINE N-OXIDES}, isbn = {0008-4042}, url = {://A1991FL97900015}, author = {Kliegel, W. and Schumacher, U. and Rettig, S. J. and Trotter, J.} } @article {7051, title = {STRUCTURAL STUDIES OF ORGANOBORON COMPOUNDS .46. 5,5-PENTAMETHYLENE-2-PHENYL-4,5-DIHYDROOXAZOL-N-OXIDE(N-O-B)TRIFLUOROBOR ANE}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {69}, number = {8}, year = {1991}, note = {ISI Document Delivery No.: GC235Times Cited: 4Cited Reference Count: 26}, month = {Aug}, pages = {1212-1216}, type = {Article}, abstract = {{The reaction of N-hydroxy-N-[(1-hydroxycyclohexyl)methyl]benzamide with dimethylether-boron trifluoride gives 5,5-penta-methylene-2-phenyl-4,5-dihydrooxazol-N-oxide(N-O-B)trifluorobo rane [3-(2,2,2-trifluoro-1-oxa-2-borataethyl)-5,5-pentamethylene-2-phenyl-1-o xa-3-azonia-2-cyclopentene] in high yield. Crystals of the product are monoclinic}, keywords = {BORON, BORON COMPOUND, CRYSTAL, crystal structure, MOLECULAR-STRUCTURE, organoboron compound}, isbn = {0008-4042}, url = {://A1991GC23500006}, author = {Kliegel, W. and Schumacher, U. and Rettig, S. J. and Trotter, J.} } @article {7047, title = {STRUCTURAL STUDIES OF ORGANOBORON COMPOUNDS .47. 6,8-BIS(1-CYANO-1-METHYLETHYL)-2,4-DIPHENYL-1,3,5-TRIOXA-6,8-DIAZA-2,4-D IBORACYCLOOCTANE}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {69}, number = {8}, year = {1991}, note = {ISI Document Delivery No.: GC235Times Cited: 7Cited Reference Count: 16}, month = {Aug}, pages = {1217-1221}, type = {Article}, abstract = {{The reaction of N,N{\textquoteright}-bis (1-cyano-1-methylethyl)-N,N{\textquoteright}-dihydroxymethanediamine with phenylbnronic acid gives 6,8-bis(-1-cyano-1-methylethy)-2,4-diphenyl-1,3,5-trioxa-6,8-diaza-2,4-d iboracyclooctane in good yield. Crystals of the product are monoclinic}, keywords = {BORON COMPOUND, CRYSTAL, crystal structure, INCIPIENT NUCLEOPHILIC ADDITIONS, MOLECULAR-STRUCTURE, organoboron compound}, isbn = {0008-4042}, url = {://A1991GC23500007}, author = {Kliegel, W. and Lubkowitz, G. and Rettig, S. J. and Trotter, J.} } @article {7018, title = {SYNTHESIS AND REACTIVITY OF RUTHENIUM AMIDE PHOSPHINE COMPLEXES - FACILE CONVERSION OF A RUTHENIUM AMIDE TO A RUTHENIUM AMINE VIA DIHYDROGEN ACTIVATION AND ORTHO METALATION - X-RAY STRUCTURE OF RUCL(C6H4PPH2)[NH(SIME2CH2PPH2)2]}, journal = {Organometallics}, volume = {10}, number = {2}, year = {1991}, note = {ISI Document Delivery No.: EY681Times Cited: 68Cited Reference Count: 38}, month = {Feb}, pages = {467-473}, type = {Article}, abstract = {{The reaction of LiN(SiMe2CH2PPh2)2 with RuCl2(PPh3)3 leads to the formation of the ruthenium amide complex RuCl(PPh3)[N(SiMe2CH2PPh2)2]. This complex reacts with H2 to form two isomeric amine-hydride derivatives of the formula RuCl(PPh3)H[NH(SiMe2CH2PPh2)2]. Reaction of RuCl(PPh3)[N-(SiMe2CH2PPh2)2] with MeLi, Me3SiCH2Li, or H2C = CHCH2MgCl does not lead to the expected hydrocarbyl derivative; rather, ortho metalation occurs to generate Ru(C6H4PPh2)[N(SiMe2CH2PPh2)2]. Attempts to displace the PPh3 ligand of RuCl(PPh3)[N(SiMe2CH2PPh2)2] with PEt3 lead to the formation of RuCl(C6H4PPh2)[NH(SiMe2PPh2)2], having an amine ligand and the ortho-metalated phenyl group. The complex RuCl(C6H4PPh2)[NH(SiMe2CH2PPh2)2] crystallizes in space group P2(1)/n with a = 9.8385 (5) angstrom}, keywords = {5-COORDINATE D6 COMPLEXES, CARBONYL-COMPLEXES, CRYSTAL, formation, HYDROGEN, IRIDIUM, MOLECULAR-STRUCTURE, STEREOSELECTIVE}, isbn = {0276-7333}, url = {://A1991EY68100025}, author = {Fryzuk,Michael D. and Montgomery, C. D. and Rettig, S. J.} } @article {7037, title = {A THIOLATE-BRIDGED DIRUTHENIUM DISODIUM COMPLEX}, journal = {Journal of the Chemical Society-Chemical Communications}, number = {11}, year = {1991}, note = {ISI Document Delivery No.: FQ589Times Cited: 9Cited Reference Count: 11}, month = {Jun}, pages = {773-774}, type = {Article}, abstract = {The tetranuclear complex [(CO)4(PPh3)2Ru2(mu-2-SEt)4(mu-3-SEt)2Na2(thf)2] (thf = tetrahydrofuran) has been synthesized; the two ruthenium centres are linked by a network consisting of four doubly- and two triply-bridging thiolate ligands and two sodium atoms.}, keywords = {ALKOXIDES, CHEMISTRY, CRYSTAL, LIGANDS, ORGANOMETALLIC COMPOUNDS, RUTHENIUM CLUSTERS}, isbn = {0022-4936}, url = {://A1991FQ58900018}, author = {Jessop, P. G. and Rettig, S. J. and James, Brian R.} }