@article {2680,
	title = {N-Heterocyclic Carbene Rhodium Complexes and Their Reactions with H-2 and with CO},
	journal = {European Journal of Inorganic Chemistry},
	number = {13},
	year = {2009},
	note = {ISI Document Delivery No.: 447KWTimes Cited: 5Cited Reference Count: 53Yu, Xiao-Yan Sun, Hongsui Patrick, Brian O. James, Brian R.},
	month = {May},
	pages = {1752-1758},
	type = {Article},
	abstract = {The NHC-Rh-I complexes [RhCl(COE)(NHC)](2) 1 and 2 [COE = cyclooctene, NHC in 1 = N,N-bis(2,6-diisopropylphenyl)imidazol-2-ylidene (IPr) and, in 2, N,N-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene (IMes)] react with H-2 in hexane to give the dimeric, mono-carbene dihydrido species [Rh(H)(2)Cl(NHC)](2) (NHC = IPr (3), IMes (4)). In the presence of further NHC, the bis-carbene dihydrido species Rh(H)(2)Cl(NHC)(2) are formed; a crystal structure of the IPr complex 5 is analogous to that of the known IMes analogue. The dihydride-mixed-carbene species Rh(H)(2)Cl(IPr)(IMes) (5a) was also observed but not isolated. A benzene solution of 5 under D-2 slowly generates the corresponding dideuteride. Reactions of the mono-carbenes (1/3, or 2/4) with CO in hexane afford the respective dicarbonyl complexes RhCl(CO)(2)(NHC) [NHC = IPr (6), IMes (7)], while CO reactions with the bis-carbene dihydrides give, respectively, the mono-carbonyl complex RhCl(CO)(IPr)(2) (8) and the known IMes analogue. All the complexes are characterized by elemental analysis, H-1 and C-13{H-1} NMR and IR spectroscopies and, in the case of 5, by X-ray crystallography. The catalytic activities of 5 and the previously reported Rh(H)(2)Cl(IMes)(2) for hydrogenation of COE and 1-octene (and isomerization of the latter) are shown to be poor. ((c) Wiley-VCH Verlag GmbH \& Co. KGaA, 69451 Weinheim, Germany, 2009)},
	keywords = {14-ELECTRON, Carbene ligands, carbonyl ligands, CATALYTIC-ACTIVITY, COORDINATION CHEMISTRY, H ACTIVATION, Hydrides, HYDROFORMYLATION, HYDROGENATION, iridium complexes, LIGANDS, NHC COMPLEX, NMR, RH(III), rhodium},
	isbn = {1434-1948},
	url = {<Go to ISI>://000266191000009},
	author = {Yu, X. Y. and Sun, H. S. and Patrick, B. O. and James, Brian R.}
}
@article {1338,
	title = {Salts of the cobalt(I) complexes [Co(CO)(5)](+) and[Co(CO)(2)(NO)(2)](+) and the Lewis acid-base adduct [CO2(CO)(7)CO-B(CF3)(3)]},
	journal = {Chemistry-a European Journal},
	volume = {12},
	number = {32},
	year = {2006},
	note = {ISI Document Delivery No.: 110YZTimes Cited: 4Cited Reference Count: 60Bernhardt, Eduard Finze, Maik Willner, Helge Lehmann, Christian W. Aubke, Friedhelm},
	month = {Nov},
	pages = {8276-8283},
	type = {Article},
	abstract = {The reaction of [Co-2(CO)(8)] with (CF3)(3)BCO in hexane leads to the Lewis acid-base adduct [CO2(CO)(7)COB(CF3)(3)] in high yield. When the reaction is performed in anhydrous HF solution [Co(CO)(5)][(CF3)(3)BF] is isolated. The product contains the first example of a homoleptic metal pentacarbonyl cation with 18 valence electrons and a trigonal-bipyramidal structure. Treatment of [Co-2(CO)(8)] or [Co(CO)(3)NO] with NO+ salts of weakly coordinating anions results in mixed crystals containing the [Co(CO)(5)](+)/[Co(CO)(2)(NO)(2)](+) ions or pure novel [Co(CO)(2)(NO)(2)](+) salts, respectively. This is a promising route to other new metal carbonyl nitrosyl cations or even homoleptic metal nitrosyl cations. All compounds were characterized by vibrational spectroscopy and by single-crystal X-ray diffraction.},
	keywords = {ALUMINUM HALIDES, ANIONS, carbonyl ligands, cobalt, density, density functional calculations, DICOBALT OCTACARBONYL, EXCHANGE, LIGANDS, METAL-CARBONYL CATIONS, NITRIC-OXIDE, NITROSYL, SOLID-STATE, SPECTROSCOPIC PROPERTIES, vibrational spectroscopy, VIBRATIONAL-SPECTRA},
	isbn = {0947-6539},
	url = {<Go to ISI>://000242418600008},
	author = {Bernhardt, E. and Finze, M. and Willner, H. and Lehmann, C. W. and Aubke, F.}
}
@article {571,
	title = {[Co(Co)(5)][(CF3)(3)BF]: A stable salt of a homoleptic trigonal-bipyramidal metal-carbonyl cation},
	journal = {Angewandte Chemie-International Edition},
	volume = {42},
	number = {18},
	year = {2003},
	note = {ISI Document Delivery No.: 681QPTimes Cited: 11Cited Reference Count: 34},
	pages = {2077-2079},
	type = {Article},
	keywords = {ACIDS, ANIONS, borates, carbonyl ligands, CO, cobalt complexes, MOLECULAR-STRUCTURE, RH, structure elucidation, superacids, UNDECAFLUORODIANTIMONATE(V), VIBRATIONAL-SPECTRA, X-RAY-DIFFRACTION},
	isbn = {1433-7851},
	url = {<Go to ISI>://000183047100021},
	author = {Bernhardt, E. and Finze, M. and Willner, H. and Lehmann, C. W. 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 = {<PT(CO)(4)><SB2F11>(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 = {<Go to ISI>://000182381600002},
	author = {Willner, H. and Aubke, F.}
}
@article {523,
	title = {Carbonyltris(trifluoromethyl)borane, (CF3)(3)BCO, an unusual boron carbonyl},
	journal = {Angewandte Chemie-International Edition},
	volume = {41},
	number = {5},
	year = {2002},
	note = {ISI Document Delivery No.: 532FTTimes Cited: 28Cited Reference Count: 27},
	pages = {799-+},
	type = {Article},
	keywords = {ab initio calculations, boranes, carbonyl ligands, COMPLEXES, IR spectroscopy},
	isbn = {1433-7851},
	url = {<Go to ISI>://000174464200023},
	author = {Terheiden, A. and Bernhardt, E. and Willner, H. and Aubke, F.}
}
@article {4680,
	title = {Gas phase ion molecule chemistry of tetracarbonyl (eta(5)-cyclopentadienyl) vanadium by Fourier transform ion cyclotron resonance},
	journal = {International Journal of Mass Spectrometry},
	volume = {182},
	year = {1999},
	note = {ISI Document Delivery No.: 171QJTimes Cited: 1Cited Reference Count: 36},
	month = {Mar},
	pages = {139-148},
	type = {Article},
	abstract = {The kinetics of the reactions between the CpV(CO)(4) molecule and its fragment cations and anions have been examined using Fourier transform ion cyclotron resonance (FTICR) techniques. With 25 eV electron impact ionization the fragment cations V+ and CpV(CO)(n=0-4)(+) react principally by charge exchange or by condensation with the parent neutral molecule. Rate constants for these pathways have been determined along with kinetic evidence for the existence of excited state cations. Some of the product cations show unexpected stability despite their large formal electron deficiency. Exchange of carbonyl ligands was also observed. Under 2.5 eV electron impact, only two anions are produced: CpV(CO)(n=2,3)(-), both of which are unreactive with the parent neutral. (C) 1999 Elsevier Science B.V.},
	keywords = {BOND-DISSOCIATION ENERGIES, CARBONYL CLUSTER FRAGMENTS, carbonyl ligands, FE(CO)5, Fourier transform ion cyclotron resonance mass, gas phase ion chemistry, iron, METAL BONDS, MN+, PENTACARBONYL, REACTIVITY, SPECTROMETRY, STATE, SYSTEMS, V+},
	isbn = {1387-3806},
	url = {<Go to ISI>://000078874700015},
	author = {Taylor, S. M. and Comisarow, M. B.}
}
@article {3099,
	title = {SYNTHESIS, CHARACTERIZATION, AND REDOX PROPERTIES OF THE 17-VALENCE-ELECTRON COMPLEXES CP{\textquoteright}CR(NO)(L)X},
	journal = {Organometallics},
	volume = {13},
	number = {2},
	year = {1994},
	note = {ISI Document Delivery No.: MX338Times Cited: 8Cited Reference Count: 35},
	month = {Feb},
	pages = {562-568},
	type = {Article},
	abstract = {Treatment of CH2Cl2 solutions of [Cp{\textquoteright}Cr(NO)I]2 [CP{\textquoteright}= Cp (eta5-C5H5) or Cp* (eta5-C5Me5)] with various P- and N-containing Lewis bases, L, affords good yields of Cp{\textquoteright}Cr(NO)(L)I complexes [L = PPh3, P(OMe)3, P(OPh)3, py, or C5H11N (pip)]. Photolysis of toluene solutions of CpCr(NO)(CO)2 in the presence of PPh3 and a source of halogen such as CH2Cl2 results in a 63\% isolated yield of CpCr(NO)(PPh3)Cl. In donor solvents, S, the ESR-active CpCr(NO)(L)X (X = Cl, I) compounds undergo either L or X substitution to form the 17-valence-electron CpCr-(NO)(S)X and [CpCr(NO)(L)(S)+ species, respectively. A kinetic analysis of the reaction of CpCr(NO)(THF)I with PPh3 shows the process to be second-order overall (first-order in each reactant) and associative in nature. The reduction potentials for the various CpCr(NO)(L)X complexes in THF vary from -1.05 to -1.65 V. These reductions are irreversible and are followed by loss of X-. Consistently, reduction of CpCr(NO)(PPh3)I in THF by Zn in the presence of P(OPh)3 affords the 18-valence-electron mixed phosphine-phosphite complex, CpCr(NO)(PPh3)[P(OPh)3]. The redox chemistry of the CpCr(NO)(L)X complexes is thus unusual in that the odd-electron species are substitutionally less labile than are, their 18-electron reduction products.},
	keywords = {19-ELECTRON, carbonyl ligands, COMPLEXES, COMPOUNDS, ME, METAL-CENTERED RADICALS, ORGANOMETALLIC NITROSYL CHEMISTRY, phosphine, {17-ELECTRON},
	isbn = {0276-7333},
	url = {<Go to ISI>://A1994MX33800030},
	author = {Legzdins,Peter and McNeil, W. S. and Shaw, M. J.}
}
