@article {2228,
	title = {Synthetic and mechanistic aspects of a new method for ruthenium-metalation of porphyrins and Schiff-bases},
	journal = {Inorganic Chemistry},
	volume = {47},
	number = {17},
	year = {2008},
	note = {ISI Document Delivery No.: 341JDTimes Cited: 3Cited Reference Count: 266Reboucas, Julio S. Cheu, Elizabeth L. S. Ware, Caroline J. James, Brian R. Skov, Kirsten A.},
	month = {Sep},
	pages = {7894-7907},
	type = {Review},
	abstract = {A new method is presented for metalation of a wide range of free-base, neutral, cationic, and anionic porphyrins in refluxing dimethylformamide (DMF) using an easily prepared [Ru(DMF)(6)](OTf)(3) complex, and comparisons are made with the more familiar metalation procedure using Ru-3(CO)(12). Both procedures generate Ru-II(porp)(CO)L complexes (L = solvent); use of the Ru-III-triflate precursor gives yields comparable to, or greater than, those obtained with the carbonyl, and generates no Ru-chlorin impurities. Mechanistic studies on the meso-tetraphenylporphyrin system reveal that the DMF furnishes the CO, which in the presence of essential water reduces the metal, and metalation likely occurs via a Ru-II-CO species. Corresponding metalation of tetradentate Schiff-bases gives trans-[Ru-III(Schiff-base)(DMF)(2)]OTf complexes in yields of similar to 50\%, a limitation being the accompanying hydrolysis of the Schiff-base through the presence of trace water.},
	keywords = {3-COMPONENT COUPLING REACTION, AQUEOUS-SOLUTION, CARBON-MONOXIDE, CATALYTIC-PROPERTIES, CRYSTAL-STRUCTURE, ELECTROCHEMICAL PROPERTIES, ORGANIC TRANSFORMATIONS, OXIDATION REACTION, REVERSIBLE BINDING, X-RAY-STRUCTURE},
	isbn = {0020-1669},
	url = {<Go to ISI>://000258709500057},
	author = {Reboucas, J. S. and Cheu, E. L. S. and Ware, C. J. and James, Brian R. and Skov, K. A.}
}
@article {650,
	title = {Solvent-dependent rate constants of muonium atom reactions},
	journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie},
	volume = {81},
	number = {2},
	year = {2003},
	note = {ISI Document Delivery No.: 652JVTimes Cited: 1Cited Reference Count: 9},
	month = {Feb},
	pages = {175-178},
	type = {Article},
	abstract = {The rates of reaction of muonium atoms with solutes, ionic and organic, were studied in solvents of wildly differing polarities (water, methanol, and hexane) and their rate constants were compared, where possible. In these reactions - which are those of a highly reactive atom, an isotope of hydrogen - it transpires that the reaction rates are higher in solvents in which the solute is more soluble and muonium diffuses faster. This study leads to various kinetic-solvent-effect ratios and to the observation of the reaction of muonium with free radicals being among the fastest reactions recorded so far between two neutral species in solution.},
	keywords = {AQUEOUS-SOLUTION, kinetic isotope effects, muon spin rotation technique, muonium atoms, non-aqueous solvents, solvent-dependent rates},
	isbn = {0008-4042},
	url = {<Go to ISI>://000181376800008},
	author = {Karolczak, S. and Gillis, H. A. and Porter, G. B. and Walker, D. C.}
}
@article {509,
	title = {Synthesis and solution studies of the complexes of pyrone analogue ligands with vanadium(IV) and vanadium(V)},
	journal = {Inorganica Chimica Acta},
	volume = {339},
	year = {2002},
	note = {ISI Document Delivery No.: 616BDTimes Cited: 8Cited Reference Count: 16},
	month = {Nov},
	pages = {393-399},
	type = {Article},
	abstract = {A new potentially tetradentate chelator N,N{\textquoteright}-bis(3-hydroxy-6-methyl-2-methylene-4-pyrone)ethylenediamine (H-2(en(ama)(2))), has been synthesized and its protonation constants, as well as those of two other 3-hydroxy-4-pyrone ligands (allomaltol (Hama) and methylmaltol (Hmma)) determined potentiometrically at 25 degreesC and 0.16 M NaCl: pK(a1) = 3.67+/-0.07, pK(a2) = 5.82+/-0.07, pK(a3) = 7.96+/-0.04, pK(a4) = 8.77+/-0.03 for [H-4(en(ama)(2))](2+), pK(a) = 8.04+/-0.02 for Hama and pK(a) = 8.82+/-0.02 for Hmma. Potentiometric pH titrations were also used to measure the stability constants of these ligands with V(IV) and V(V) and to study the structures of the complexes of (en(ama)(2))(2-) in aqueous solution. H-1 NMR was used to assign the protonation constant values to the different protons in H-2(en(ama)(2)). A pM versus pH plot confirmed that H-2(en(ama)(2)) has much stronger complexation than its bidentate analogues, in the same pH range. (C) 2002 Elsevier Science B.V. All rights reserved.},
	keywords = {AQUEOUS-SOLUTION, BIS(MALTOLATO)OXOVANADIUM(IV), GLUCOSE, insulin drugs, ION-COORDINATING PROPERTIES, potentiometry, stability constants, vanadium complexes},
	isbn = {0020-1693},
	url = {<Go to ISI>://000179281100048},
	author = {Song, B. and Saatchi, K. and Rawji, G. H. and Orvig, Chris}
}
@article {363,
	title = {Two-dimensional (2D) pulsed electron paramagnetic resonance study of VO2+-triphosphate interactions: Evidence for tridentate triphosphate coordination, and relevance to bone uptake and insulin enhancement by vanadium pharmaceuticals},
	journal = {Journal of the American Chemical Society},
	volume = {124},
	number = {12},
	year = {2002},
	note = {ISI Document Delivery No.: 533GFTimes Cited: 35Cited Reference Count: 59},
	month = {Mar},
	pages = {2969-2978},
	type = {Article},
	abstract = {Two- and four-pulse electron spin echo envelope modulation (ESEEM) and four-pulse two-dimensional hyperfine sublevel correlation (HYSCORE) spectroscopies have been used to determine the solution structure of a 3:1 triphosphate:vanadyl solution at pH 5.0. Limited quantitative data were extracted from the two pulse spectra; however, HYSCORE proved to be more useful in the detection and interpretation of the P-31 and H-1 couplings. Three sets of cross-peaks were observed for each nucleus. For the P-31 couplings, three sets of cross-peaks were observed in the HYSCORE spectrum, and contour line shape analysis yielded coupling constants of approximately 15, 9, and 1 MHz. HYSCORE cross-peaks in the proton region were partially overlapping; however, interpretation of the proton coupling was simplified through the use of one-dimensional four-pulse ESEEM and subsequent analysis of the sum combination peaks. Comparison of the derived isotropic and anisotropic coupling constants with results from earlier ESEEM and electron nuclear double resonance (ENDOR) studies was consistent with the presence of at least one, and most likely two, water molecules coordinated in the equatorial plane of the vanadyl cation. The vanadyl-triphosphate system was shown to be an accurate model of the in vivo vanadyl-phosphate coupling constants determined in an earlier study (Dikanov, S. A.; Liboiron, B. D.; Thompson, K. H.; Vera, E.; Yuen, V. G.; McNeill, J. H.; Orvig, C. J. Am. Chem. Soc. 1999, 121,11004.) Comparison of these values to those found in previous spectroscopic studies of vanadyl-triphosphate interactions, along with a detailed structural interpretation, are presented, This work represents the first detection of tridentate polyphosphate coordination to the vanadyl ion, and the first observation of an axial phosphate interaction not previously reported in earlier ENDOR and pulsed electron paramagnetic resonance studies.},
	keywords = {AQUEOUS-SOLUTION, DIABETES-MELLITUS, DISORDERED-SYSTEMS, ECHO ENVELOPE MODULATION, HYSCORE SPECTROSCOPY, {2-DIMENSIONAL ESEEM},
	isbn = {0002-7863},
	url = {<Go to ISI>://000174520500030},
	author = {Dikanov, S. A. and Liboiron, B. D. and Orvig, Chris}
}
@article {5087,
	title = {Host-guest binding of simple cavitands in water},
	journal = {Chemical Communications},
	number = {24},
	year = {2001},
	note = {ISI Document Delivery No.: 507TGTimes Cited: 15Cited Reference Count: 37},
	month = {Dec},
	pages = {2680-2681},
	type = {Article},
	abstract = {Simple water soluble cavitands were prepared and the thermodynamics of their binding with neutral guests in water is reported.},
	keywords = {AQUEOUS-SOLUTION, COMPLEXATION, ERROR PROPAGATION, INDUCED-FIT, MEDIA, molecular recognition, MONTE-CARLO SIMULATION, NMR CHEMICAL-SHIFTS, RECTANGULAR HYPERBOLAE, SOLUBLE RESORCIN<4>ARENE},
	isbn = {1359-7345},
	url = {<Go to ISI>://000173044900077},
	author = {Gui, X. and Sherman, J. C.}
}
@article {4984,
	title = {Coaggregation of paramagnetic d- and f-block metal ions with a podand-framework amine phenol ligand},
	journal = {Inorganic Chemistry},
	volume = {39},
	number = {3},
	year = {2000},
	note = {ISI Document Delivery No.: 283FQTimes Cited: 37Cited Reference Count: 86},
	month = {Feb},
	pages = {508-516},
	type = {Article},
	abstract = {This report covers initial studies in the coaggregation of nickel (Ni2+) and lanthanide (Ln(3+)) metal ions to form complexes with interesting structural and magnetic properties. The tripodal amine phenol ligand H(3)tam (1,1,1-tris(((2-hydroxybenzyl)amino)methyl)ethane) is shown to be particularly accommodating with respect to the geometric constraints of both transition and lanthanide metal ions, forming isolable complexes with both of these ion types. In the solid-state structure of [Ni(H(2)tam)(CH3CN)]PF6.2.5CH(3)CN.0.5CH(3)OH (1), the Ni(II) center has a distorted octahedral geometry, with an N3O2 donor set from the [H(2)tam](-) ligand and a coordinated solvent (acetonitrile) occupying the sixth site. The reaction of stoichiometric amounts of H(3)tam with the Ni(II) ion in the presence of lanthanide(III) ions provides [LnNi(2)(tam)(2)](+) cationic complexes which contain coaggregated metal ions. These complexes are isolable and have been characterized by a variety of analytical techniques, with mass spectrometry proving to be particularly diagnostic. The solid-state structures of [LaNi2(tam)(2)(CH3OH)(1/2)-(CH3CH2OH)(1/2)(H2O)]ClO4.0.5CH(3)OH.4H(2)O (2), [DyNi2(tam)(2)(CH3OH)(H2O)]ClO4.CH3OH.H2O (6), and [YbNi2(tam)(2)(H2O)]ClO4.2.58H(2)O (9) have been determined. Each complex contains two octahedral Ni(II) ions, each of which is encapsulated by the ligand tam(3-) in an N3O3 coordination sphere; each [Ni(tam)](-)unit caps the lanthanide(III) ion via bridging phenoxy oxygen donor atoms. In 2, La3+ is eight-coordinated, while in 6, Dy(III) is seven- (to "weakly eight-") coordinated, and Yb(III) in 9 has a six-coordination environment. The complexes are symmetrically different, 2 possessing C-1 symmetry and 6 and 9 having CI symmetry. Magnetic studies of 2, 6, and 9 indicate that antiferromagnetic exchange coupling between the Ni(II) and Ln(III) ions increases with decreasing ionic radius of Ln(III).},
	keywords = {AQUEOUS-SOLUTION, COMPARTMENTAL SCHIFF-BASES, COPPER-LANTHANOID COMPLEXES, CRYSTAL-STRUCTURES, DINICKEL(II) COMPLEXES, HEPTADENTATE LIGANDS, MACROCYCLIC COMPLEXES, MAGNETIC-PROPERTIES, MOLECULAR-STRUCTURE, SPIN-EXCHANGE},
	isbn = {0020-1669},
	url = {<Go to ISI>://000085266100018},
	author = {Xu, Z. Q. and Read, P. W. and Hibbs, D. E. and Hursthouse, M. B. and Malik, K. M. A. and Patrick, B. O. and Rettig, S. J. and Seid, M. and Summers, D. A. and Pink, M. and Thompson, R. C. and Orvig, Chris}
}
@article {4984,
	title = {Coaggregation of paramagnetic d- and f-block metal ions with a podand-framework amine phenol ligand},
	journal = {Inorganic Chemistry},
	volume = {39},
	number = {3},
	year = {2000},
	note = {ISI Document Delivery No.: 283FQTimes Cited: 37Cited Reference Count: 86},
	month = {Feb},
	pages = {508-516},
	type = {Article},
	abstract = {This report covers initial studies in the coaggregation of nickel (Ni2+) and lanthanide (Ln(3+)) metal ions to form complexes with interesting structural and magnetic properties. The tripodal amine phenol ligand H(3)tam (1,1,1-tris(((2-hydroxybenzyl)amino)methyl)ethane) is shown to be particularly accommodating with respect to the geometric constraints of both transition and lanthanide metal ions, forming isolable complexes with both of these ion types. In the solid-state structure of [Ni(H(2)tam)(CH3CN)]PF6.2.5CH(3)CN.0.5CH(3)OH (1), the Ni(II) center has a distorted octahedral geometry, with an N3O2 donor set from the [H(2)tam](-) ligand and a coordinated solvent (acetonitrile) occupying the sixth site. The reaction of stoichiometric amounts of H(3)tam with the Ni(II) ion in the presence of lanthanide(III) ions provides [LnNi(2)(tam)(2)](+) cationic complexes which contain coaggregated metal ions. These complexes are isolable and have been characterized by a variety of analytical techniques, with mass spectrometry proving to be particularly diagnostic. The solid-state structures of [LaNi2(tam)(2)(CH3OH)(1/2)-(CH3CH2OH)(1/2)(H2O)]ClO4.0.5CH(3)OH.4H(2)O (2), [DyNi2(tam)(2)(CH3OH)(H2O)]ClO4.CH3OH.H2O (6), and [YbNi2(tam)(2)(H2O)]ClO4.2.58H(2)O (9) have been determined. Each complex contains two octahedral Ni(II) ions, each of which is encapsulated by the ligand tam(3-) in an N3O3 coordination sphere; each [Ni(tam)](-)unit caps the lanthanide(III) ion via bridging phenoxy oxygen donor atoms. In 2, La3+ is eight-coordinated, while in 6, Dy(III) is seven- (to "weakly eight-") coordinated, and Yb(III) in 9 has a six-coordination environment. The complexes are symmetrically different, 2 possessing C-1 symmetry and 6 and 9 having CI symmetry. Magnetic studies of 2, 6, and 9 indicate that antiferromagnetic exchange coupling between the Ni(II) and Ln(III) ions increases with decreasing ionic radius of Ln(III).},
	keywords = {AQUEOUS-SOLUTION, COMPARTMENTAL SCHIFF-BASES, COPPER-LANTHANOID COMPLEXES, CRYSTAL-STRUCTURES, DINICKEL(II) COMPLEXES, HEPTADENTATE LIGANDS, MACROCYCLIC COMPLEXES, MAGNETIC-PROPERTIES, MOLECULAR-STRUCTURE, SPIN-EXCHANGE},
	isbn = {0020-1669},
	url = {<Go to ISI>://000085266100018},
	author = {Xu, Z. Q. and Read, P. W. and Hibbs, D. E. and Hursthouse, M. B. and Malik, K. M. A. and Patrick, B. O. and Rettig, S. J. and Seid, M. and Summers, D. A. and Pink, M. and Thompson, R. C. and Orvig, Chris}
}
@article {4418,
	title = {Structural, spectroscopic, thermodynamic and kinetic properties of copper(II) complexes with tripodal tetraamines},
	journal = {Inorganic Chemistry},
	volume = {37},
	number = {16},
	year = {1998},
	note = {ISI Document Delivery No.: 110GETimes Cited: 87Cited Reference Count: 38},
	month = {Aug},
	pages = {4022-4029},
	type = {Article},
	abstract = {Spectroscopic, thermodynamic, and kinetic measurements have been made on aqueous solutions of copper(II) complexes of hexamethylated tren and trimethylated tren (one methylation per primary amine group of tren) with the objective of correlating: the influence of geometry (trigonal bipyramidal, evident from UV/vis spectroscopy) and N-alkyl substitution in the ligand on these inherent properties. At 25.0 degrees C the protonation constants of Me(3)tren are not significantly different from those of tren and Me(6)tren, and the stability constant for the Cu(II) complex is of the same order of magnitude as that for the [Cu(tren)(H2O)](2+) complex ion; The pK(a) for deprotonation of the coordinated water molecule of [Cu(Me(3)tren)(H2O)](2+) is intermediate between the values for the complexes containing the unsubstituted and the fully substituted tren ligand. Substitution (pyridine for water) kinetics measurements employing stopped-flow and temperature-jump methods revealed different patterns of reactivity: pyridine replaces water in [Cu(Me(3)tren)(H2O)](2+) with a second-order rate constant of (4.4 +/- 0.8) x 10(2) M-1 s(-1) at 25.0 degrees C, whereas the corresponding process for [Cu(Me(6)tren)(H2O)](2+) is relatively complex and is discussed in more detail. Substitution in the former complex ion is characterized in the forward and reverse directions, by Delta H-double dagger = 60 +/- 8 and 51.9 +/- 0.9 kJ mol(-1), Delta S-double dagger = 5 +/- 27 and -23 +/- 3 J mol(-1) K-1, and Delta V-double dagger = -8.7 +/- 4.6 and -6.2 +/- 1.1 cm(3) mol(-1), respectively, It is concluded that this reaction follows an I-a mechanism, similar to that reported for the comparable reaction of [Cu(tren)(H2O)](2+). An X-ray structural determination on a crystal of [Cu-2(Me(3)tren)(2)(CN)] (ClO4)(3) . 2CH(3)CN demonstrated trigonal bipyramidal geometry about each copper(II) center. As has been found in comparable complexes of tren and Me(6)tren, the axial nitrogen to copper bond is shorter than the equatorial nitrogen-copper bonds, and the angle made by N(axial)-Cu-N(equatorial) is less than 90 degrees (84.6-85.4 degrees), signifying that each copper ion lies below the plane of the equatorial nitrogen atoms.},
	keywords = {AQUEOUS-SOLUTION, CRYSTAL-STRUCTURE, ELECTRONIC-PROPERTIES, IMIDAZOLE, ION, MECHANISM, PHENANTHROLINE, PRESSURE-DEPENDENCE, RESONANCE, SUBSTITUTION KINETICS},
	isbn = {0020-1669},
	url = {<Go to ISI>://000075371200019},
	author = {Thaler, F. and Hubbard, C. D. and Heinemann, F. W. and vanEldik, R. and Schindler, S. and Fabian, I. and Dittler-Klingemann, A. M. and Hahn, F. E. and Orvig, Chris}
}
@article {3926,
	title = {Cationic lanthanide complexes of N,N{\textquoteright}-bis(2-pyridylmethyl)ethylenediamine-N,N{\textquoteright}-diacetic acid (H(2)bped)},
	journal = {Inorganic Chemistry},
	volume = {36},
	number = {7},
	year = {1997},
	note = {ISI Document Delivery No.: WQ490Times Cited: 22Cited Reference Count: 51},
	month = {Mar},
	pages = {1316-1321},
	type = {Article},
	abstract = {A series of monocationic lanthanide complexes containing the ligand N,N{\textquoteright}-bis(2-pyridylmethyl)ethylenediamine-N,N{\textquoteright}-diacetate(2-) (bped(2-)) have been prepared and isolated as either the hexafluorophosphate or perchlorate salts. The complexes have been characterized by H-1 and C-13 NMR, +LSIMS, IR, and elemental analysis. Complex formation constants have been measured in water at 25 degrees C (mu = 0.16 M (NaCl)). log K (Ln(bped)](+)) (log K([Ln(bped)(OH)])): Ln = La, 10.81 (0.06); Ln = Nd, 11.99 (1.45); Ln = Gd, 12.37 (2.10); Ln = Ho, 12.31 (3.00); Ln = Yb, 13.32 (4.43). The stability constants for [M(bped)](+) increase from La(III) to Nd(III), plateau to Ho(III), and increase again to Yb(III), while the formation constants for [Ln(bped)(OH)] increase almost linearly with atomic number. The solution structures of the [Ln(bped)](+) complexes have been probed by multinuclear NMR (H-1, C-13, O-17) studies, and these indicate only one isomer present in solution; this isomer has 2-fold symmetry and is rigid at 20 degrees C on the NMR time scale. O-17 NMR studies of the paramagnetic lanthanides indicate that the hydration number is 3, [Ln(bped)(H2O)(2)](+), and that an overall coordination number of 9 is maintained across the lanthanide series.},
	keywords = {AQUEOUS-SOLUTION, CARBOXYLATES, COMPLEXES, COORDINATION-NUMBER, EDTA, GADOLINIUM(III), NMR, NUCLEAR MAGNETIC-RESONANCE, polarization, SHIFT-REAGENTS, SHIFTS, WATER-MOLECULES},
	isbn = {0020-1669},
	url = {<Go to ISI>://A1997WQ49000007},
	author = {Caravan, P. and Mehrkhodavandi, Parisa and Orvig, Chris}
}
@article {3926,
	title = {Cationic lanthanide complexes of N,N{\textquoteright}-bis(2-pyridylmethyl)ethylenediamine-N,N{\textquoteright}-diacetic acid (H(2)bped)},
	journal = {Inorganic Chemistry},
	volume = {36},
	number = {7},
	year = {1997},
	note = {ISI Document Delivery No.: WQ490Times Cited: 22Cited Reference Count: 51},
	month = {Mar},
	pages = {1316-1321},
	type = {Article},
	abstract = {A series of monocationic lanthanide complexes containing the ligand N,N{\textquoteright}-bis(2-pyridylmethyl)ethylenediamine-N,N{\textquoteright}-diacetate(2-) (bped(2-)) have been prepared and isolated as either the hexafluorophosphate or perchlorate salts. The complexes have been characterized by H-1 and C-13 NMR, +LSIMS, IR, and elemental analysis. Complex formation constants have been measured in water at 25 degrees C (mu = 0.16 M (NaCl)). log K (Ln(bped)](+)) (log K([Ln(bped)(OH)])): Ln = La, 10.81 (0.06); Ln = Nd, 11.99 (1.45); Ln = Gd, 12.37 (2.10); Ln = Ho, 12.31 (3.00); Ln = Yb, 13.32 (4.43). The stability constants for [M(bped)](+) increase from La(III) to Nd(III), plateau to Ho(III), and increase again to Yb(III), while the formation constants for [Ln(bped)(OH)] increase almost linearly with atomic number. The solution structures of the [Ln(bped)](+) complexes have been probed by multinuclear NMR (H-1, C-13, O-17) studies, and these indicate only one isomer present in solution; this isomer has 2-fold symmetry and is rigid at 20 degrees C on the NMR time scale. O-17 NMR studies of the paramagnetic lanthanides indicate that the hydration number is 3, [Ln(bped)(H2O)(2)](+), and that an overall coordination number of 9 is maintained across the lanthanide series.},
	keywords = {AQUEOUS-SOLUTION, CARBOXYLATES, COMPLEXES, COORDINATION-NUMBER, EDTA, GADOLINIUM(III), NMR, NUCLEAR MAGNETIC-RESONANCE, polarization, SHIFT-REAGENTS, SHIFTS, WATER-MOLECULES},
	isbn = {0020-1669},
	url = {<Go to ISI>://A1997WQ49000007},
	author = {Caravan, P. and Mehrkhodavandi, Parisa and Orvig, Chris}
}
@article {3928,
	title = {Effect of pyridyl donors in the chelation of aluminum(III), gallium(III), and indium(III)},
	journal = {Inorganic Chemistry},
	volume = {36},
	number = {7},
	year = {1997},
	note = {ISI Document Delivery No.: WQ490Times Cited: 18Cited Reference Count: 62},
	month = {Mar},
	pages = {1306-1315},
	type = {Article},
	abstract = {{A new preparation of N,N{\textquoteright}-bis(2-pyridylmethyl)ethylenediamine-N,N{\textquoteright}-diacetic acid (H(2)bped) is reported, and its properties of complexation with Al(III), Ga(III), In(III), and Co(III) are investigated. The molecular structure of the cobalt(III) complex [Co(bped)]PF6 . CH3CN . H2O (C20H25CoF6N5O5P) has been solved by X-ray methods; the complex crystallizes in the triclinic space group P (1) over bar, with a = 10.611(2) Angstrom},
	keywords = {AQUEOUS-SOLUTION, BINDING CONSTANTS, COMPLEXES, COORDINATION, CRYSTAL-STRUCTURES, LIGANDS, METAL-IONS, MULTINUCLEAR MAGNETIC-RESONANCE, N, N{\textquoteright}-BIS(2-HYDROXYBENZYL)ETHYLENEDIAMINE-N, N{\textquoteright}-DIACETIC ACID, STABILITY},
	isbn = {0020-1669},
	url = {<Go to ISI>://A1997WQ49000006},
	author = {Caravan, P. and Rettig, S. J. and Orvig, Chris}
}
@article {4135,
	title = {Fast muonium reactions in solution: An electron spin exchange interaction with Cr(NCS)(6)(3-) in water and reaction with iodine in organic solvents},
	journal = {Journal of Physical Chemistry A},
	volume = {101},
	number = {26},
	year = {1997},
	note = {ISI Document Delivery No.: XG935Times Cited: 3Cited Reference Count: 34},
	month = {Jun},
	pages = {4741-4744},
	type = {Article},
	abstract = {Two reactions of muonium atoms close to the diffusion-controlled limit were analyzed as a function of solute size and solvent viscosity. With Cr(NCS)(6)(3-) as solute in water, the reaction is an electron spin-conversion process, and the observed rate is taken to be half of the actual encounter rate, because of the quantum mechanical statistical factor and the occurrence of multiple collisions due to the solvent cage effect. The encounter rate deduced is 6.2 x 10(10) M-1 s(-1), which implies a large cross section for the Cr complex. In a second series of experiments, the rate of reaction of muonium with I-2 was compared in water, methanol and n-heptane. The bimolecular rate constants determined are (1.7 +/- 0.3), (7.0 +/- 1.2), and (57 +/- 22) x 10(10) M-1 s(-1), respectively, in these three solvents. This similar to 30-fold change in rate is not matched by the change in the inverse of the solvents{\textquoteright} viscosities, which changed overall by a factor of only 2.4. It looks as if quantum tunneling dominates over classical diffusion in less polar media where muonium is unencumbered by solvent clathration.},
	keywords = {AQUEOUS-SOLUTION, COMPLEXES, HYDROGEN-ATOMS, O-2, POSITRONIUM, radicals, relaxation, ROTATION},
	isbn = {1089-5639},
	url = {<Go to ISI>://A1997XG93500012},
	author = {Stadlbauer, J. M. and Venkateswaran, K. and Porter, G. B. and Walker, D. C.}
}
@article {3799,
	title = {Characterization of a buried neutral histidine residue in Bacillus circulans xylanase: NMR assignments, pH titration, and hydrogen exchange},
	journal = {Protein Science},
	volume = {5},
	number = {11},
	year = {1996},
	note = {ISI Document Delivery No.: VQ786Times Cited: 41Cited Reference Count: 63},
	month = {Nov},
	pages = {2319-2328},
	type = {Article},
	abstract = {Bacillus circulans xylanase contains two histidines, one of which (His 156) is solvent exposed, whereas the other (His 149) is buried within its hydrophobic core. His 149 is involved in a network of hydrogen bonds with an internal water and Ser 130, as well as a potential weak aromatic-aromatic interaction with Tyr 105. These three residues, and their network of interactions with the bound water, are conserved in four homologous xylanases. To probe the structural role played by His 149, NMR spectroscopy was used to characterize the histidines in BCX. Complete assignments of the H-1, C-13, and N-15 resonances and tautomeric forms of the imidazole rings were obtained from two-dimensional heteronuclear correlation experiments. An unusual spectroscopic feature of BCX is a peak near 12 ppm arising from the nitrogen bonded H-1(epsilon 2) of His 149. Due to its solvent inaccessibility and hydrogen bonding to an internal water molecule, the exchange rate of this proton (4.0 X 10(-5) s(-1) at pH* 7.04 and 30 degrees C) is retarded by > 10(6)-fold relative to an exposed histidine. The pK(a) of His 156 is unperturbed at similar to 6.5, as measured from the pH dependence of the N-15- and H-1-NMR spectra of BCX. In contrast, His 149 has a pK(a) < 2.3, existing in the neutral (NH)-H-epsilon 2 tautomeric state under all conditions examined. BCX unfolds at low pH and 30 degrees C, and thus His 149 is never protonated significantly in the context of the native enzyme. The structural importance of this buried histidine is confirmed by the destablizing effect of substituting a phenylalanine or glutamine at position 149 in BCX.},
	keywords = {ACTIVE-SITE, ALPHA-HELICES, AQUEOUS-SOLUTION, CHEMICAL-SHIFTS, ESCHERICHIA-COLI, GLYCOSYL HYDROLASES, H-1-NMR SPECTRUM, HYDROGEN-DEUTERIUM EXCHANGE, IMIDAZOLE, internal water, L-ALA-OH, NUCLEAR MAGNETIC-RESONANCE, pH titration, pK(alpha), PROTEIN HYDRATION, protein stability},
	isbn = {0961-8368},
	url = {<Go to ISI>://A1996VQ78600018},
	author = {Plesniak, L. A. and Connelly, G. P. and Wakarchuk, W. W. and McIntosh, L. P.}
}
@article {3750,
	title = {Highly symmetric group 13 metal-phosphinato complexes: Multinuclear NMR (Al-27, P-31, Ga-71) determination of stability constants at low pH},
	journal = {Journal of the American Chemical Society},
	volume = {118},
	number = {43},
	year = {1996},
	note = {ISI Document Delivery No.: VQ089Times Cited: 12Cited Reference Count: 56},
	month = {Oct},
	pages = {10446-10456},
	type = {Article},
	abstract = {{An N4O3 tripodal tren-based (aminomethylene)phosphinato ligand tris(4-(phenylphosphinato)-3-methyl-3-azabutyl)amine (H(3)ppma) has been synthesized, and its complexation properties with the group 13 metals Al, Ga. and In have been investigated. The molecular structure of the indium complex [In(H(3)ppma)(2)](NO3)(3) . 3H(2)O (C60H96InN11O24P6) has been solved by X-ray methods; the complex crystallizes in the trigonal space group R(3) over barc$, with a = 18.984(3) Angstrom},
	keywords = {ACID, AL(III), aluminum, AMINE PHENOL LIGANDS, AQUEOUS-SOLUTION, COMPLEXES, gallium, IONS, LANTHANIDE(III), NUCLEAR-MAGNETIC-RESONANCE, PHOSPHONODIPEPTIDES},
	isbn = {0002-7863},
	url = {<Go to ISI>://A1996VQ08900015},
	author = {Lowe, M. P. and Rettig, S. J. and Orvig, Chris}
}
@article {3827,
	title = {Oxidation kinetics of the potent insulin mimetic agent bis(maltolato)oxovanadium(IV) (BMOV) in water and in methanol},
	journal = {Inorganic Chemistry},
	volume = {35},
	number = {6},
	year = {1996},
	note = {ISI Document Delivery No.: UA169Times Cited: 58Cited Reference Count: 45},
	month = {Mar},
	pages = {1667-1673},
	type = {Article},
	abstract = {{The kinetics of oxidation of bis(maltolato)oxovanadium(IV), BMOV or VO(ma)(2), by dioxygen have been studied by UV-vis spectroscopy in both MeOH and H2O media. The VO(ma)(2):O-2 stoichiometry was 4:1. In aqueous solution, the pH-dependeut rate of the VO(ma)(2)/O-2 reaction to generate cis-[VO2(ma)(2)](-) is attributed to the deprotonation of coordinated H2O, the deprotonated species [VO(ma)(2)(OH)](-) being more easily oxidized (k(OH) = 0.39 M(-1) s(-1), 25 degrees C) than the neutral form VO(ma)(2)(H2O) (k(H2O) = 0.08 M(-1) s(-1), 25 degrees C). The activation parameters for the two second-order reactions in aqueous solution were deduced from variable temperature kinetic measurements. In MeOH, VO(ma)(2) was oxidized by dioxygen to cis-VO(OMe)(ma)(2), whose structure was characterized by single-crystal X-ray diffraction; the crystals were monoclinic, C2/c, with a = 28.103(1) Angstrom},
	keywords = {ANATION, AQUEOUS-SOLUTION, COMPLEXES, CYSTEINE, KINASE, RAT ADIPOCYTES, VANADYL TREATMENT},
	isbn = {0020-1669},
	url = {<Go to ISI>://A1996UA16900042},
	author = {Sun, Y. and James, Brian R. and Rettig, S. J. and Orvig, Chris}
}
@article {3827,
	title = {Oxidation kinetics of the potent insulin mimetic agent bis(maltolato)oxovanadium(IV) (BMOV) in water and in methanol},
	journal = {Inorganic Chemistry},
	volume = {35},
	number = {6},
	year = {1996},
	note = {ISI Document Delivery No.: UA169Times Cited: 58Cited Reference Count: 45},
	month = {Mar},
	pages = {1667-1673},
	type = {Article},
	abstract = {{The kinetics of oxidation of bis(maltolato)oxovanadium(IV), BMOV or VO(ma)(2), by dioxygen have been studied by UV-vis spectroscopy in both MeOH and H2O media. The VO(ma)(2):O-2 stoichiometry was 4:1. In aqueous solution, the pH-dependeut rate of the VO(ma)(2)/O-2 reaction to generate cis-[VO2(ma)(2)](-) is attributed to the deprotonation of coordinated H2O, the deprotonated species [VO(ma)(2)(OH)](-) being more easily oxidized (k(OH) = 0.39 M(-1) s(-1), 25 degrees C) than the neutral form VO(ma)(2)(H2O) (k(H2O) = 0.08 M(-1) s(-1), 25 degrees C). The activation parameters for the two second-order reactions in aqueous solution were deduced from variable temperature kinetic measurements. In MeOH, VO(ma)(2) was oxidized by dioxygen to cis-VO(OMe)(ma)(2), whose structure was characterized by single-crystal X-ray diffraction; the crystals were monoclinic, C2/c, with a = 28.103(1) Angstrom},
	keywords = {ANATION, AQUEOUS-SOLUTION, COMPLEXES, CYSTEINE, KINASE, RAT ADIPOCYTES, VANADYL TREATMENT},
	isbn = {0020-1669},
	url = {<Go to ISI>://A1996UA16900042},
	author = {Sun, Y. and James, Brian R. and Rettig, S. J. and Orvig, Chris}
}
@article {3107,
	title = {PREPARATION OF 2-SUBSTITUTED AND 4-SUBSTITUTED 3-HYDROXY-5-METHYLFURANS AND THE ALUMINUM AND GALLIUM COMPLEXES OF 3-HYDROXY-5-METHYL-2-(N-METHYLFORMAMIDO)FURAN},
	journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie},
	volume = {72},
	number = {5},
	year = {1994},
	note = {ISI Document Delivery No.: NU280Times Cited: 3Cited Reference Count: 40},
	month = {May},
	pages = {1362-1369},
	type = {Article},
	abstract = {In model studies designed to study the synthesis of potentially hexadentate chelates based on the linkage of three furan rings to a triamine via amide linkages, new 2- and 1-substituted 3-hydroxy-5-methylfurans have been prepared. Particularly, 3-hydroxy-5-methyl-(N-methylformamido)fur (Hahm) and its Al and Ga complexes (M(ahm)(3)) have been prepared and thoroughly characterized by a variety of techniques, in the solid state and in solution. Solution equilibrium studies (mu = 0.6 M NaCl, 25 degrees C) uncovered a complicated set of equilibria in the Al3+/Hahm system; the solution potentiometric data were best explained by the presence of mixed ligand (HL = Hahm, L(-) = ahm(-)) hydroxo species [Al-3(OH)(4)L(3)](2+) and [AI(OH)(2)L(2)](-), in addition to the expected [AlL(n)]((3-n)+) (n = 1, 2, 3) species. Further solution studies at HL:M ratios of 3:1 (mu = 0.15 M NaCl, 25 degrees C) showed that Hahm is a relatively weak complexing agent for both Al and Ga, forming tris-ligand species with overall formation constants of 10(19.5) and 10(20.6), respectively.},
	keywords = {0.6 M NA(CL), 3-HYDROXY-4-PYRIDINONES, ACID, AQUEOUS-SOLUTION, EQUILIBRIUM, HYDROLYSIS, indium, SILICON(IV)},
	isbn = {0008-4042},
	url = {<Go to ISI>://A1994NU28000020},
	author = {Lutz, T. G. and Clevette, D. J. and Hoveyda, H. R. and Karunaratne, V. and Nordin, A. and Sjoberg, S. and Winter, M. and Orvig, Chris}
}
@article {2829,
	title = {COORDINATION CHEMISTRY OF 2-(2{\textquoteright}-HYDROXYPHENYL)-2-BENZOXAZOLE WITH GALLIUM(III) AND ALUMINUM(III) - 2 UNCOMMON GROUP-13 METAL ENVIRONMENTS STABILIZED BY A BIOLOGICALLY RELEVANT BINDING GROUP},
	journal = {Inorganic Chemistry},
	volume = {32},
	number = {22},
	year = {1993},
	note = {ISI Document Delivery No.: ME779Times Cited: 28Cited Reference Count: 36},
	month = {Oct},
	pages = {4909-4913},
	type = {Article},
	abstract = {{The coordination chemistry of Ga(III) and Al(III) with 2-(2{\textquoteright}-hydroxyphenyl)-2-benzoxazole (Hhbo) was investigated both in the solid state (X-ray crystallography) and in solution (H-1, C-13, Al-27 N MR) These two group 13 metal ions exhibit different reactivities toward this bulky bidentate ligand leading with Ga(III) to the formation of Ga(hbo)3 (1) and [Ga(hbo)2(0,0{\textquoteright}-CH3CO2)] (2) complexes depending on the reaction conditions. With AI(III), the only complex formed is[Al(mu-OH)(hbo)2]2(3). The Ga bis(ligand) acetate complex 2 (C28H19GaN2O6) crystallizes in the monoclinic space group C2/c with a = 16.008(3) angstrom},
	keywords = {ACID, AQUEOUS-SOLUTION, COMPLEXES, EQUILIBRIUM, HYDROLYSIS, PERSPECTIVE, PROTEINS, RIBONUCLEOTIDE REDUCTASE, SILICON(IV), SPECIATION},
	isbn = {0020-1669},
	url = {<Go to ISI>://A1993ME77900041},
	author = {Hoveyda, H. R. and Rettig, S. J. and Orvig, Chris}
}
@article {7359,
	title = {ISOTOPE EFFECTS ON THE EXCESS PARTIAL MOLAR ENTHALPIES OF (XCH3(CH2)3O(CH2)2O(H OR D)+(1-X)(H2O OR D2O))},
	journal = {Journal of Chemical Thermodynamics},
	volume = {24},
	number = {2},
	year = {1992},
	note = {ISI Document Delivery No.: HC049Times Cited: 9Cited Reference Count: 16},
	month = {Feb},
	pages = {159-165},
	type = {Article},
	keywords = {2-BUTOXYETHANOL, AQUEOUS-SOLUTION, WATER},
	isbn = {0021-9614},
	url = {<Go to ISI>://A1992HC04900007},
	author = {Siu, W. W. Y. and Wong, T. Y. H. and Lai, J. T. W. and Chong, A. and Koga,Yoshikata}
}
