@article {1392, title = {Glucosamine conjugates of tricarbonylcyclopentadienyl rhenium(I) and technetium(I) cores}, journal = {Inorganic Chemistry}, volume = {45}, number = {17}, year = {2006}, note = {ISI Document Delivery No.: 073DPTimes Cited: 13Cited Reference Count: 43Ferreira, Cara L. Ewart, Charles B. Bayly, Simon R. Patrick, Brian O. Steele, Jennifer Adam, Michael J. Orvig, Chris}, month = {Aug}, pages = {6979-6987}, type = {Article}, abstract = {To obtain a Tc-99m glucose conjugate for imaging, double-ligand transfer (DLT) and related reactions were examined for the preparation of CpM(CO)(3) (Cp = cyclopentadienyl; M = Re, Tc) complexes with pendant carbohydrates at Cp. Tricarbonyl {N-(1,3,4,6-tetra-O-acetyl-2-amino-2-deoxy-beta-D-glucopyranose) cyclopentadienyl carboxamide} rhenium(I) (1a) and tricarbonyl {N-(2-amino-2-deoxy-beta-D-glucopyranose) cyclopentadienyl carboxamide} rhenium(I) (2a) were prepared. The compounds were fully characterized by mass spectrometry, elemental analysis, IR, and NMR spectroscopy. Full assignment of the NMR spectra verified the pendant nature of the glucosamine moieties in the solution state and that 2a exists as both anomers. The solid-state structure of 2a was determined by X-ray crystallography, again confirming the pendant nature of the glucosamine, but differing from the solution state in that the, anomer crystallized preferentially (93\%). Compound 2a was determined to be a high-affinity competitive inhibitor (K-i = 330 +/- 70 mu M) of the glucose metabolism enzyme hexokinase, demonstrating that it retains certain biological activity. The Tc-99m analogues 1b and 2b were prepared in moderate radiochemical yields by means of the single-ligand transfer (SLT) route, which is more pertinent to radiopharmaceutical synthesis.}, keywords = {BIOMOLECULES, COORDINATION, CYCLOPENTADIENYL-TRICARBONYL COMPLEXES, DERIVATIVES, FUNCTIONALIZATION, IN-VITRO, METAL-COMPLEXES, RE-186(I), RECEPTOR, TC-99M}, isbn = {0020-1669}, url = {://000239723300060}, author = {Ferreira, C. L. and Ewart, C. B. and Bayly, S. R. and Patrick, B. O. and Steele, J. and Adam,Michael J. and Orvig, Chris} } @article {1392, title = {Glucosamine conjugates of tricarbonylcyclopentadienyl rhenium(I) and technetium(I) cores}, journal = {Inorganic Chemistry}, volume = {45}, number = {17}, year = {2006}, note = {ISI Document Delivery No.: 073DPTimes Cited: 13Cited Reference Count: 43Ferreira, Cara L. Ewart, Charles B. Bayly, Simon R. Patrick, Brian O. Steele, Jennifer Adam, Michael J. Orvig, Chris}, month = {Aug}, pages = {6979-6987}, type = {Article}, abstract = {To obtain a Tc-99m glucose conjugate for imaging, double-ligand transfer (DLT) and related reactions were examined for the preparation of CpM(CO)(3) (Cp = cyclopentadienyl; M = Re, Tc) complexes with pendant carbohydrates at Cp. Tricarbonyl {N-(1,3,4,6-tetra-O-acetyl-2-amino-2-deoxy-beta-D-glucopyranose) cyclopentadienyl carboxamide} rhenium(I) (1a) and tricarbonyl {N-(2-amino-2-deoxy-beta-D-glucopyranose) cyclopentadienyl carboxamide} rhenium(I) (2a) were prepared. The compounds were fully characterized by mass spectrometry, elemental analysis, IR, and NMR spectroscopy. Full assignment of the NMR spectra verified the pendant nature of the glucosamine moieties in the solution state and that 2a exists as both anomers. The solid-state structure of 2a was determined by X-ray crystallography, again confirming the pendant nature of the glucosamine, but differing from the solution state in that the, anomer crystallized preferentially (93\%). Compound 2a was determined to be a high-affinity competitive inhibitor (K-i = 330 +/- 70 mu M) of the glucose metabolism enzyme hexokinase, demonstrating that it retains certain biological activity. The Tc-99m analogues 1b and 2b were prepared in moderate radiochemical yields by means of the single-ligand transfer (SLT) route, which is more pertinent to radiopharmaceutical synthesis.}, keywords = {BIOMOLECULES, COORDINATION, CYCLOPENTADIENYL-TRICARBONYL COMPLEXES, DERIVATIVES, FUNCTIONALIZATION, IN-VITRO, METAL-COMPLEXES, RE-186(I), RECEPTOR, TC-99M}, isbn = {0020-1669}, url = {://000239723300060}, author = {Ferreira, C. L. and Ewart, C. B. and Bayly, S. R. and Patrick, B. O. and Steele, J. and Adam,Michael J. and Orvig, Chris} } @article {1252, title = {Cleavage of hydrazine and 1,1-dimethylhydrazine by dinuclear tantalum hydrides: Formation of imides, nitrides, and N,N-dimethylamine}, journal = {Journal of the American Chemical Society}, volume = {127}, number = {2}, year = {2005}, note = {ISI Document Delivery No.: 887RZTimes Cited: 11Cited Reference Count: 21}, month = {Jan}, pages = {500-501}, type = {Article}, keywords = {BRIDGING N-2 UNIT, COORDINATION, DINITROGEN COMPLEX, END-ON, FUNCTIONALIZATION, LIGAND, METAL-COMPLEXES, N-N BOND, REDUCTIVE CLEAVAGE, SIDE-ON}, isbn = {0002-7863}, url = {://000226324500013}, author = {Shaver, M. P. and Fryzuk,Michael D.} } @article {1212, title = {Formation of phosphorus-nitrogen bonds by reduction of a titanium phosphine complex under molecular nitrogen}, journal = {Journal of the American Chemical Society}, volume = {127}, number = {37}, year = {2005}, note = {ISI Document Delivery No.: 965CYTimes Cited: 27Cited Reference Count: 22}, month = {Sep}, pages = {12796-12797}, type = {Article}, keywords = {ATOMS, CHEMISTRY, CLEAVAGE, COORDINATION, DINITROGEN ACTIVATION, LIGAND, NIOBIUM, ZIRCONIUM}, isbn = {0002-7863}, url = {://000231928800024}, author = {Morello, L. and Yu, P. H. and Carmichael, C. D. and Patrick, B. O. and Fryzuk,Michael D.} } @article {1142, title = {Palladium(II) complexes of bis(phosphine)monooxide and bis(phosphine)monosulphide ligands bearing o-N,N-dimethylanilinyl substituents}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {83}, number = {6-7}, year = {2005}, note = {ISI Document Delivery No.: 963UVTimes Cited: 3Cited Reference Count: 49}, month = {Jun}, pages = {546-552}, type = {Article}, abstract = {{Palladium( II) complexes of bis( phosphine) monooxide and bis( phosphine) monosulphide ligands with the general formula Ar2P( CH2) P-n( E) Ar-2 are described ( n = 1 ( dmapmE)}, keywords = {ARYL HALIDES, BIPHOSPHINE MONOXIDE LIGANDS, BISPHOSPHINE LIGANDS, CATALYSIS, CHEMISTRY, CHIRAL DIPHOSPHINE, COORDINATION, CROSS-COUPLING REACTIONS, DONOR, OXIDATION, palladium, phosphine, phosphine oxide, phosphine sulphide, PHOSPHINE-LIGANDS}, isbn = {0008-4042}, url = {://000231832500007}, author = {Jones, N. D. and James, Brian R.} } @article {947, title = {Carbon-nitrogen bond formation via the reaction of terminal alkynes with a dinuclear side-on dinitrogen complex}, journal = {Journal of the American Chemical Society}, volume = {126}, number = {31}, year = {2004}, note = {ISI Document Delivery No.: 843TSTimes Cited: 27Cited Reference Count: 21}, month = {Aug}, pages = {9480-9481}, type = {Article}, keywords = {ACTIVATION, COORDINATION, FIXATION, FUNCTIONALIZATION, HETEROCYCLES, HYDROAMINATION, METAL-COMPLEXES, MOLECULAR NITROGEN, MOLYBDENUM, N-2}, isbn = {0002-7863}, url = {://000223110100007}, author = {Morello, L. and Love, J. B. and Patrick, B. O. and Fryzuk,Michael D.} } @article {1010, title = {Complementary inhibition of synoviocyte, smooth muscle cell or mouse lymphoma cell proliferation by a vanadyl curcumin complex compared to curcumin alone}, journal = {Journal of Inorganic Biochemistry}, volume = {98}, number = {12}, year = {2004}, note = {ISI Document Delivery No.: 876VBTimes Cited: 20Cited Reference Count: 62}, month = {Dec}, pages = {2063-2070}, type = {Article}, abstract = {A novel vanadyl curcumin complex (VO(cur)2) has been synthesized and and its physicochemical properties characterized. Biological characterization included in vitro testing for anti-rheumatic activity in synoviocytes, angiogenesis inhibition in smooth muscle cells and anti-cancer potential in mouse lymphoma cells; as well as in vivo testing for hypoglycemic activity by oral gavage in streptozotocin (STZ)-diabetic rats. VO(cur)2 was more effective as an anti-cancer agent, compared to uncomplexed curcumin or vanadyl ion alone, was more than twice as effective as curcumin alone as an anti-arthritic agent, and was more than four times as effective as curcumin alone in inhibiting smooth muscle cell proliferation. In both acute and chronic screening tests, VO(cur)2 was ineffective as an insulin mimetic agent; however, it also proved to be exceptionally non-toxic, with no evidence of negative symptornatology during a month-long treatment period, at doses up to and including 2.0 mmol kg(-1) day(-1). (C) 2004 Elsevier Inc. All rights reserved.}, keywords = {antioxidant, apoptosis, arthritis lymphoma, BIS(MALTOLATO)OXOVANADIUM(IV), CELLS, COMPLEX, COORDINATION, curcurnin, DIABETIC-RATS, DIFERULOYL METHANE CURCUMIN, FREE-RADICALS, INDUCED LIPID-PEROXIDATION, INSULIN MIMICS, LEUKEMIA HL-60, METAL-IONS, OXIDATIVE STRESS, vanadyl ion}, isbn = {0162-0134}, url = {://000225525200010}, author = {Thompson, K. H. and Bohmerle, K. and Polishchuk, E. and Martins, C. and Toleikis, P. and Tse, J. and Yuen, V. and McNeill, J. H. and Orvig, Chris} } @article {667, title = {Amidate complexes of titanium and zirconium: a new class of tunable precatalysts for the hydroamination of alkynes}, journal = {Chemical Communications}, number = {19}, year = {2003}, note = {ISI Document Delivery No.: 733YYTimes Cited: 71Cited Reference Count: 25}, month = {Oct}, pages = {2462-2463}, type = {Article}, abstract = {A series of bis(amidate)group 4-bis(amido) complexes have been prepared, characterized and have been shown to be highly tunable precatalysts for both the intra- and intermolecular hydroamination of alkynes.}, keywords = {AMIDES, ANILINES, CATALYZED INTERMOLECULAR HYDROAMINATION, COORDINATION, INTRAMOLECULAR HYDROAMINATION/CYCLIZATION, LIGAND, TERMINAL ALKYNES}, isbn = {1359-7345}, url = {://000186029500034}, author = {Li, C. Y. and Thomson, R. K. and Gillon, B. and Patrick, B. O. and Schafer, L. L.} } @article {619, title = {Diamidophosphine complexes of niobium(III) and (IV): imide formation via ancillary ligand decomposition}, journal = {Inorganica Chimica Acta}, volume = {350}, year = {2003}, note = {ISI Document Delivery No.: 700BTTimes Cited: 10Cited Reference Count: 32}, month = {Jul}, pages = {293-298}, type = {Article}, abstract = {The diamidophosphine complexes of niobium (CyPh)[NPN]NbCl(DME) (2), (CyPh)[NPN]NbCl2 (6), and (PhPh)[NPN]NbCl2 (9), where (RR{\textquoteright})[NPN]=RP(CH2SiMe2NR{\textquoteright})(2) have been prepared, isolated and characterized. Generation of (RR{\textquoteright})[NPN]NbCl(DME) species competes with the production of ((RR{\textquoteright})[NPN]NbCl)(2)(mu-N-2) and can be controlled with N-2 pressure. (CyPh)[NPN]NbCl2 spontaneously decomposes into (CyPh)[NPN]NbCl(=NPh) (7), CyP(CH2SiMe2)(2)NPh (8), and a paramagnetic impurity. Compound 7 was characterized by an X-ray diffraction study and its structural features are discussed. The Nb-N-imido bond length is 1.789(2) Angstrom with a Nb-N-imido-C bond angle of 167.9(2)degrees in a distorted square pyramidal structure. Reduction of (PhPh)[NPN]NbCl2 (9), with KC8 produced (PhPh)[NPN]NbCl(=NPh), PhP(CH2SiMe2)(2)NPh, and a paramagnetic impurity. (C) 2002 Elsevier Science B.V. All rights reserved.}, keywords = {ALKYNES, COORDINATION, diamidophosphine ligands, imido, MECHANISM, MEDIATED IMINE METATHESIS, NIOBIUM, ORGANOIMIDO COMPLEXES, REDUCTION, ROUTE, Si-N bond cleavage, tantalum}, isbn = {0020-1693}, url = {://000184093300036}, author = {Fryzuk,Michael D. and Shaver, M. P. and Patrick, B. O.} } @article {775, title = {Ruthenium(II) acetylacetonato-sulfoxide complexes}, journal = {Inorganic Chemistry Communications}, volume = {6}, number = {8}, year = {2003}, note = {ISI Document Delivery No.: 707PBTimes Cited: 9Cited Reference Count: 35}, month = {Aug}, pages = {996-1000}, type = {Article}, abstract = {The water-soluble Ru-II acetylacetonato-sulfoxide complexes, cis-Ru(acac)(2)(DMSO)(2) (1) and Ru(acac)(2)(meso-BESE) (2), were synthesized (BESE = 1,2-bis(ethylsulfinyl)ethane = EtS(O)(CH2)(2)S(O)Et). Both complexes were characterized by H-1 and C-13{H-1} NMR, UV-Vis, and IR spectroscopies, as well as MS, elemental analysis, solution conductivity, and cyclic voltammetry, while the molecular structure of 2 was determined also by X-ray crystallography. All sulfoxide ligands are S-bonded. The complexes were tested against human breast cancer cells (MDA-MB-435S) using an in vitro MTT assay, a colorimetric determination of cell viability; IC50 values of >2000 and 1500 +/- 100 muM were determined for 1 and 2, respectively, while cisplatin exhibits an IC50 value of 30 +/- 5 muM. (C) 2003 Elsevier Science B.V. All rights reserved.}, keywords = {2D NMR spectroscopy, acetylacetonato, ANTITUMOR-ACTIVITY, CANCER, CHEMISTRY, COLORIMETRIC ASSAY, COORDINATION, INVITRO, PRECURSOR, ruthenium, STRUCTURAL-CHARACTERIZATION, sulfoxides, TUMOR CELL-LINES}, isbn = {1387-7003}, url = {://000184518100004}, author = {Wu, A. and Kennedy, David C and Patrick, B. O. and James, Brian R.} } @article {641, title = {The synthesis, structural characterization, and in vitro anti-cancer activity of chloro(p-cymene) complexes of ruthenium(II) containing a disulfoxide ligand}, journal = {Inorganica Chimica Acta}, volume = {352}, year = {2003}, note = {ISI Document Delivery No.: 711FATimes Cited: 39Cited Reference Count: 47}, month = {Aug}, pages = {238-246}, type = {Article}, abstract = {Two diruthenium(II) complexes [RuCl2(p-cymene)](2)(mu-BESE) (1), [RuCl2(p-cymene)](2)(mu-BESP) (2), and the mononuclear salt [RuCl(p-cymene)(BESE)]PF6 (3), containing the disulfoxides BESE and BESP, were synthesized and characterized by elemental analysis, and NMR and IR spectroscopies, and were shown to contain S-bound sulfoxide groups; the disulfoxides are EtS(O)(CH2)(n) S(O)Et, where n = 2 (BESE) or 3 (BESP). Complexes 1 and 3 were also characterized by X-ray crystallography. Preliminary in vitro tests of I and 3 were conducted using the MTT assay, which measures mitochondrial dehydrogenase activity as an indication of cell viability; these complexes showed in vitro anti-cancer activity against a human mammary cancer cell line (MDA-MB-435s) with IC50 values of 360 and 55 muM, respectively. (C) 2003 Elsevier B.V. All rights reserved.}, keywords = {anti-cancer activity, arene complexes, CANCER, cell, COMPLEX, COORDINATION, crystal structures, CRYSTAL-STRUCTURE, DIMETHYL-SULFOXIDE LIGAND, DIRUTHENIUM(II), disulfoxide ligands, INHIBITION, p-Cymene complexes, RADIOSENSITIZING ACTIVITY, ruthenium complexes, SOLUTION CHEMISTRY}, isbn = {0020-1693}, url = {://000184727900029}, author = {Huxham, L. A. and Cheu, E. L. S. and Patrick, B. O. and James, Brian R.} } @article {629, title = {Toward binary nitrosyls: Distinctly bent Fe-N-O linkages in base-stabilized Fe(NO)(3)(+) complexes}, journal = {Journal of the American Chemical Society}, volume = {125}, number = {42}, year = {2003}, note = {ISI Document Delivery No.: 733FYTimes Cited: 15Cited Reference Count: 50}, month = {Oct}, pages = {12935-12944}, type = {Article}, abstract = {Air- and moisture-sensitive Fe(NO)(3)(eta(1)-PF6) (1) may be conveniently prepared by treating Fe(NO)(3)Cl with 1 equiv of [Ag][PF6] in CH2Cl2 or by reacting [NO][PF6] with excess iron filings in MeNO2. Complex 1 is thermally sensitive both as a solid and in solutions, and is best handled below -20 degreesC. To isolate 1 reproducibly from MeNO2 solutions it is necessary to remove all traces of propionitrile, which often occurs as an impurity in MeNO2, because it reacts with Lewis-acidic 1 to form [Fe(NO)(3)(EtCN)][PF6] (2). If trace H2O is present during the synthesis of 1, some of the PF6- is converted to PO2F2-, which is sufficiently Lewis basic that it captures two Fe(NO)(3)(+) fragments and forms [(ON)(3)Fe(mu-PO2F2)Fe(NO)(3)]-[PF6] (3). Finally, Fe(NO)(3)(eta(1)-BF4) (4) can be obtained as a green microcrystalline powder by employing the same synthetic methodologies used to prepare 1. The new complexes 1-4 have been characterized by conventional spectroscopic methods, and the solid-state molecular structures of 2, 3, and 4 and their parent compound, Fe(NO)(3)Cl, have been established by X-ray diffraction methods. The iron centers in the Fe(NO)(3) fragments in all these structures exhibit approximately tetrahedral coordination geometries, and the Fe-N-O linkages are distinctly nonlinear with bond angles in the range of 159 to 169degrees. DFT calculations on Fe(NO)(3)(eta(1)-BF4) (4) confirm that its bent Fe-N-O links have an electronic origin and need not be attributed to other factors, such as packing forces in the crystal. Interestingly, the bending of the NO ligands results in an increase in the energy of the HOMO, relative to the linear case, but at the same time causes a decrease in energy of the HOMO-1 and the HOMO-2 molecular orbitals. This more than compensates for the higher energy of the HOMO, resulting in a lower energy structure.}, keywords = {basis set, CALCULATIONS, COORDINATION, CRYSTAL-STRUCTURE, density, impurities, MOLECULAR, NITROMETHANE, PURIFICATION, REFINEMENT, TETRANITROSYLCHROMIUM CR(NO)4}, isbn = {0002-7863}, url = {://000185990300054}, author = {Hayton, T. W. and McNeil, W. S. and Patrick, B. O. and Legzdins,Peter} } @article {734, title = {Vanadium and niobium diamidophosphine complexes and their reactivity}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {81}, number = {12}, year = {2003}, note = {ISI Document Delivery No.: 751CNTimes Cited: 7Cited Reference Count: 27}, month = {Dec}, pages = {1431-1437}, type = {Article}, abstract = {The tridentate ligand precursors R{\textquoteright}P(CH2SiMe2NR")(2) ((R{\textquoteright}R{\textquoteright}{\textquoteright})[NPN]: R{\textquoteright} = Cy, Ph; R" = Ph, Mes, Me) were prepared from metathesis reactions of a lithiated amine, chloro(chloromethyl)dimethylsilane, the appropriate 1degrees phosphine, and n-butyl lithium and were isolated as solvent adducts. Metathesis between (CyPh)[NPN]Li-2(OEt2), 2, and VCl3(THF)(3) afforded ((CyPh)[NPN]VCl)(2), 7, whose solid-state structure was established by X-ray crystallography. Reduction attempts of the ((R{\textquoteright}R{\textquoteright}{\textquoteright})[NPN]VCl)(2) species with KC8 incorporated molecular nitrogen but were complicated by imide formation and ligand decomposition. Metathesis of 2 with NbCl2Me3 afforded the highly unstable complex (CyPh)[NPN]NbMe3, 15. Attempts to hydrogenate this species were unsuccessful.}, keywords = {3-COORDINATE MOLYBDENUM(III), BRIDGING N-2 UNIT, COORDINATION, COORDINATION CHEMISTRY, DINITROGEN COMPLEX, END-ON, FUNCTIONALIZATION, HYDROGENATION, LIGAND, METATHESIS, NIOBIUM, REDUCTION, REDUCTIVE CLEAVAGE, SIDE-ON, TANTALUM COMPLEX, VANADIUM}, isbn = {0008-4042}, url = {://000187035400001}, author = {Shaver, M. P. and Thomson, R. K. and Patrick, B. O. and Fryzuk,Michael D.} } @article {452, title = {Formation of a tris-capsule and a tris-carceplex from a cyclic six-bowl assembly}, journal = {Chemical Communications}, number = {16}, year = {2002}, note = {ISI Document Delivery No.: 584WWTimes Cited: 8Cited Reference Count: 25}, month = {Aug}, pages = {1672-1673}, type = {Article}, abstract = {A macrocycle composed of six cavitands was assembled into a tris-capsule and a tris-carceplex, each of which encapsulates three guest molecules.}, keywords = {CAVITANDS, CHEMISTRY, COMPLEXATION, COORDINATION, DIMERIC CAPSULE, HYDROGEN-BONDS, MOTION, ORGANIC-MOLECULES, REVERSIBLE MOLECULAR CAPSULES, TEMPLATION}, isbn = {1359-7345}, url = {://000177492600008}, author = {Mungaroo, R. and Sherman, J. C.} } @article {407, title = {Homo- and heterobimetallic precursor catalysts for the Heck reaction, and a proposal for a general catalytic cooperativity index}, journal = {Advanced Synthesis \& Catalysis}, volume = {344}, number = {10}, year = {2002}, note = {ISI Document Delivery No.: 629XZTimes Cited: 22Cited Reference Count: 58}, month = {Dec}, pages = {1126-1134}, type = {Article}, abstract = {Homo- (Pd-2) and heterobimetallic (PtPd) complexes supported by a P,P-bridging, bis(P,N-chelating) coordination mode of the potentially hexadentate ligand 1,1-bis[di(o-N,N-dimethylanilinyl)phosphino] methane (dmapm) are effective catalyst precursors for the aerobic Heck coupling of iodobenzene and styrene at 100degreesC in DMF/H2O solution containing K2CO3. This medium allows for trivial separation of the trans-stilbene product which precipitates after the reaction mixture is cooled. The bimetallic precursors are more active than predicted from the sum of the activities of complexes chosen to mimic their mono-metallic "half units," suggesting some degree of intermetallic cooperativity during the reaction. A non-linear dependence of initial rate on catalyst concentration implies, however, that the complexes do not remain intact, and may be involved in dissociative equilibria with non-dmapm containing monometallic components that are more active species for the Heck coupling. The complexes are slowly degraded by oxidation at a phosphorus centre. A general index for quantifying the degree of intermetallic cooperativity during a catalytic cycle is proposed and its utility and limitations are discussed.}, keywords = {aerobic), ASYMMETRIC CATALYSIS, bimetallic, CHEMISTRY, cooperativity, COORDINATION, COUPLING, Heck reaction (aqueous, HIGH REGIOSELECTIVITY, homogeneous, HYDROFORMYLATION, HYDROGEN, LIGANDS, NICKEL(II) SITE, palladium, PALLADIUM(II) COMPLEXES, phosphine (anilinyl), platinum, REACTIONS, thermomorphic, VINYLIC SUBSTITUTION-REACTIONS}, isbn = {1615-4150}, url = {://000180078900015}, author = {Jones, N. D. and James, Brian R.} } @article {4808, title = {Dinuclear pi complexes of yttrium and lutetinm with sandwiched naphthalene and anthracene ligands: Evidence for rapid intramolecular inter-ring rearrangements}, journal = {Angewandte Chemie-International Edition}, volume = {39}, number = {4}, year = {2000}, note = {ISI Document Delivery No.: 286YKTimes Cited: 17Cited Reference Count: 24}, pages = {767-+}, type = {Article}, keywords = {arene complexes, COORDINATION, DIANION, fluxionality, lanthanides, MOLECULAR-STRUCTURE, YTTRIUM}, isbn = {1433-7851}, url = {://000085476300019}, author = {Fryzuk,Michael D. and Jafarpour, L. and Kerton, F. M. and Love, J. B. and Rettig, S. J.} } @article {4927, title = {Homotrinuclear lanthanide(III) arrays: Assembly of and conversion from mononuclear and dinuclear units}, journal = {Inorganic Chemistry}, volume = {39}, number = {3}, year = {2000}, note = {ISI Document Delivery No.: 283FQTimes Cited: 48Cited Reference Count: 54}, month = {Feb}, pages = {496-507}, type = {Article}, abstract = {The reactions of potentially hexadentate H(2)bbpen (N,N{\textquoteright}-bis(2-hydroxybenzyl)-N,N{\textquoteright}-bis(2-pyridylmethyl)ethylenediamine, H(2)L1), H-2(Cl)bbpen (N,N{\textquoteright}-bis(5-chloro-2-hydroxybenzyl)-N,N{\textquoteright}-bis(2-pyridylmethyl)ethylene-di amine. H(2)L2), and H-2(Br)bbpen (N,N{\textquoteright}-bis(5-bromo-2-hydroxybenzyl)-N,N{\textquoteright}-bis(2-pyridylmethyl)ethylenediam ine H(2)L3) with Ln(III) ions in the presence of a base in methanol resulted in three types of complexes: neutral mononuclear ([LnL(NO3)]), monocationic dinuclear ([Ln(2)Ln(2)(NO3)](+)), and monocationic trinuclear ([Ln(3)L(2)(X)(n)-(CH3OH)](+)) when X = bridging (CH3COO-) and bidentate ligands (NO3-, CH3COO-, ClO4-) and n is 4. The formation of a complex depends on the bose (hydroxide or acetate) and the size of the respective Ln(III) ion. All complexes were characterized by infrared spectroscopy, mass spectrometry, and elemental analyses; in some cases, X-ray diffraction studies were also performed. The structures of the neutral mononuclear [Yb(L1)(NO3)], dinuclear [Pr-2(L1)(2)(NO3)(H2O)]NO3.CH3OH and [Gd-2(L1)(2)(NO3)]NO3.CH3OH.3H(2)O, and trinuclear [Gd-3(L3)(2)(CH3- COO)(4)(CH3OH)]ClO4.5CH(3)OH and [Sm-3(L1)(2)(CH3COO)(2)(NO3)(2)(CH3OH)]NO3.CH3OH.3.65H(2)O were solved by X-ray crystallography. The [LnL(NO3)] or [Ln(2)L(2)(NO3)](+) complexes could be converted to [Ln(3)L(2)(X)(n)(CH3-OH)](+) complexes by the addition of 1 equiv of a Ln(III) salt and 2-3 equiv of sodium acetate in methanol. The trinuclear complexes were found to be the most stable of the three types, which was evident from the presence of the intact monocationic high molecular weight parent peaks ([Ln(3)L(2)(X)(n)](+)) in the mass spectra of all the trinuclear complexes and from the ease of conversion from the mononuclear or dinuclear to the trinuclear species. The incompatibility of the ligand denticity with the coordination requirements of the Ln(III) ions was proven to be a useful tool in the construction of multinuclear Ln(III) metal ion arrays.}, keywords = {AMINE PHENOL LIGANDS, ANTIBODY, COORDINATION, CRYSTAL-STRUCTURE, GADOLINIUM, IONS, METAL-COMPLEXES, MOLECULAR-STRUCTURE, SAMARIUM(III), Schiff-base}, isbn = {0020-1669}, url = {://000085266100017}, author = {Setyawati, I. A. and Liu, S. and Rettig, S. J. and Orvig, Chris} } @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 {4740, title = {The synthesis and the molecular structure of hexakis (carbonyl)hexafluoroantimonato(V)tungsten(II) undecafluorodiantimonate (V), [W(CO)(6)(FSbF5)][Sb2F11]}, journal = {Inorganic Chemistry}, volume = {39}, number = {10}, year = {2000}, note = {ISI Document Delivery No.: 315QGTimes Cited: 10Cited Reference Count: 35}, month = {May}, pages = {2172-2177}, type = {Article}, abstract = {{The reaction of tungsten hexacarbonyl, W(CO)(6), with antimony(V) fluoride, SbF5, in the conjugate Bronsted-Lewis superacid HF-SbF5 at 40 degrees C produces quantitatively the salt [W(CO)(6)(FSbF5)][Sb2F11] as the main product. The observed 2e(-) oxidation without any loss of CO is unprecedented. The cation [W(CO)(6)(FSbF5)](+) is seven coordinated with a distorted C-2v capped trigonal prismatic structure. [W(CO)(6)(FSbF5)][Sb2F11] crystallizes in the monoclinic space group P-21 (No. 4). a 8.2051(12) Angstrom}, keywords = {ANIONS, COMPLEXES, COORDINATION, CRYSTAL-STRUCTURE}, isbn = {0020-1669}, url = {://000087124000027}, author = {Brochler, R. and Sham, I. H. T. and Bodenbinder, M. and Schmitz, V. and Rettig, S. J. and Trotter, J. and Willner, H. and Aubke, F.} } @article {4740, title = {The synthesis and the molecular structure of hexakis (carbonyl)hexafluoroantimonato(V)tungsten(II) undecafluorodiantimonate (V), [W(CO)(6)(FSbF5)][Sb2F11]}, journal = {Inorganic Chemistry}, volume = {39}, number = {10}, year = {2000}, note = {ISI Document Delivery No.: 315QGTimes Cited: 10Cited Reference Count: 35}, month = {May}, pages = {2172-2177}, type = {Article}, abstract = {{The reaction of tungsten hexacarbonyl, W(CO)(6), with antimony(V) fluoride, SbF5, in the conjugate Bronsted-Lewis superacid HF-SbF5 at 40 degrees C produces quantitatively the salt [W(CO)(6)(FSbF5)][Sb2F11] as the main product. The observed 2e(-) oxidation without any loss of CO is unprecedented. The cation [W(CO)(6)(FSbF5)](+) is seven coordinated with a distorted C-2v capped trigonal prismatic structure. [W(CO)(6)(FSbF5)][Sb2F11] crystallizes in the monoclinic space group P-21 (No. 4). a 8.2051(12) Angstrom}, keywords = {ANIONS, COMPLEXES, COORDINATION, CRYSTAL-STRUCTURE}, isbn = {0020-1669}, url = {://000087124000027}, author = {Brochler, R. and Sham, I. H. T. and Bodenbinder, M. and Schmitz, V. and Rettig, S. J. and Trotter, J. and Willner, H. and Aubke, F.} } @article {4681, title = {Self-assembly of novel trimers using dipyrromethene ligands}, journal = {Chemical Communications}, number = {7}, year = {1999}, note = {ISI Document Delivery No.: 184WETimes Cited: 59Cited Reference Count: 21}, month = {Apr}, pages = {631-632}, type = {Article}, abstract = {Ligands comprising two dipyrromethene units linked at the beta-position have been used to prepare trimeric complexes with Zn-II and Co-II; the structure of the Zn-II complex is confirmed by X-ray analysis.}, keywords = {ARCHITECTURE, COMPLEXES, COORDINATION, IONS, SPONTANEOUS GENERATION}, isbn = {1359-7345}, url = {://000079636100031}, author = {Thompson, A. and Rettig, S. J. and Dolphin, D.} } @article {4546, title = {Synthesis and structure of the tantalum trimethyl complex [P2N2]TaMe3 and its conversion to the tantalum methylidene species [P2N2]Ta = CH2(Me) ([P2N2] = PhP(CH2SiMe2NSiMe2CH2)(2)PPh)}, journal = {Organometallics}, volume = {18}, number = {20}, year = {1999}, note = {ISI Document Delivery No.: 244CDTimes Cited: 25Cited Reference Count: 42}, month = {Sep}, pages = {4059-4067}, type = {Article}, abstract = {A tantalum(V) trimethyl complex and its photolysis product, a relatively stable tantalum(V) methyl methylidene, were prepared using the macrocyclic bis(amido-phosphine) PhP(CH2SiMe2NSiMe2CH2)(2)PPh, abbreviated [P2N2], as an ancillary ligand. The methylidene precursor [P2N2]TaMe3 is generated by the reaction of [P2N2]Li-2. C4H8O2 (C4H8O2 = 1,4-dioxane) with TaMe3Cl2. The solid-state X-ray molecular structure demonstrates that the geometry of [P2N2]TaMe3 is a seven-coordinate capped trigonal prism, and NMR studies confirm this is also true in solution at low temperature. Photolysis with a UV source generates [P2N2]Ta=CH2(Me), with the elimination of methane. The X-ray solid-state molecular structure of [P2N2]Ta=CH2(Me) is intermediate between octahedral and trigonal-prismatic geometry. Variable-temperature NMR studies demonstrate that the double-bonded methylidene moiety rotates with a barrier of 33.5 +/- 0.6 kJ/mol, in contrast to the larger barrier estimated for the previously characterized 18-electron complex (eta(5)-C5H5)(2)Ta=CH2(Me). Reaction of [P2N2]TaMe3 with Ph3C+BF4- or PhNMe2H+B(C6F5)(4)(-) produced {[P2N2]TaMe2}+BF4- and {[P2N2]TaMe2}B+(C6F5)(4)(-), respectively. Attempts to deprotonate {[P2N2]TaMe2}(+) did not provide a chemical route to [P2N2]Ta=CH2(Me) and instead generated either [P2N2]TaMe2F or the product of deprotonation of the [P2N2] ligand methylene backbone, Ta(Me-2)[(CHSiMe2NSiMe2CH2P(Ph)CH2SiMe2NSiMe2CH2PPh)], depending on the base and counteranion used.}, keywords = {ABSTRACTION, CATALYSIS, COORDINATION, CRYSTAL-STRUCTURES, DECOMPOSITION, DERIVATIVES, imido, METAL-CARBON BONDS, METHYLENE COMPLEX, REACTIVITY}, isbn = {0276-7333}, url = {://000083033500019}, author = {Fryzuk,Michael D. and Johnson, S. A. and Rettig, S. J.} } @article {4189, title = {Synthesis and characterization of homoleptic ruthenium(II) imidazole complexes, and a carbonyl species derived by CO abstraction from DMF}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {76}, number = {10}, year = {1998}, note = {ISI Document Delivery No.: 156LMTimes Cited: 15Cited Reference Count: 37}, month = {Oct}, pages = {1379-1388}, type = {Article}, abstract = {{[Ru(II)(L)(6)](2+) complexes were synthesized from [Ru(DMF)(6)][CF3SO3](3); DMF = dimethylformamide}, keywords = {ABSTRACTION, AQUATION, CHEMISTRY, CO, COORDINATION, crystal structures, CRYSTAL-STRUCTURES, hexakis(imidazole)ruthenium(II) triflates, PORPHYRIN}, isbn = {0008-4042}, url = {://000078002800008}, author = {Baird, I. R. and Rettig, S. J. and James, Brian R. and Skov, K. A.} } @article {4336, title = {Tightening the hydrophobic belt: Effects of backbone and donor group variation on podand ligand complexes of the lanthanides}, journal = {Inorganic Chemistry}, volume = {37}, number = {7}, year = {1998}, note = {ISI Document Delivery No.: ZG944Times Cited: 44Cited Reference Count: 53}, month = {Apr}, pages = {1637-1647}, type = {Article}, abstract = {{The N4O3 tripodal aminomethylene phosphinato ligand tris(4-phenylphosphinato-3-methyl-3-azabutyl)amine (H-3-ppma) forms mono- and bis(ligand) complexes with lanthanide(III) metal ions Ln when Ln = Sm-Lu. The formation constants of the Lu (log beta(1) = 1.79, log beta(2) = 4.40) and the Yb (log beta(1) = 2.25, log beta(2) = 4.42) complexes were determined at pH = 1.5 using an unusual P-31 NMR spectroscopic method. The molecular structure of the lutetium complex [Lu(H(3)ppma)(2)](NO3)(3) . 3H(2)O (C60H96LuN11O24P6) was solved by X-ray methods; it crystallizes in the trigonal space group R(3) over barc$, with a = 19.060(1) Angstrom}, keywords = {AMINE PHENOL LIGANDS, BIOLOGICAL-SYSTEMS, CHEMISTRY, COORDINATION, DESIGN, HEPTADENTATE LIGANDS, METAL-IONS, NMR SHIFTS, NUCLEAR MAGNETIC-RESONANCE, STABILITY}, isbn = {0020-1669}, url = {://000073055700034}, author = {Lowe, M. P. and Caravan, P. and Rettig, S. J. and Orvig, Chris} } @article {4050, title = {Cyclopentadienyl nitrosyl compounds of chromium: aqueous solution chemistry, pi bonding and nitric oxide loss}, journal = {Journal of the Chemical Society-Dalton Transactions}, number = {18}, year = {1997}, note = {ISI Document Delivery No.: XZ144Times Cited: 9Cited Reference Count: 59}, month = {Sep}, pages = {3269-3276}, type = {Article}, abstract = {{The compiler [Cr(eta-C5H5)(NO)(2)(CF3SO3)] 1 was synthesised in order to explore the relationship between a-donor ligands and nitrosyl lability and to investigate the aqueous chemistry of the [Cr(eta-C5H5)(NO)(2)](+) fragment. Treatment of 1 with sigma-donor ligands gave [Cr(eta-C5H5)(NO)(2)(L)][CF3SO3] salts. Potentiometric titrations and H-1 NMR spectroscopic studies of 1 provided evidence for the existence of [Cr(eta-C5H5)(NO)(2)-(H2O)](+) and [Cr(eta-C5H5)(NO)(2)-(OH)] in aqueous solution. When generated in sitic, [Cr(eta-C5H5)(NO)(2)-(OH)] reacted with acetylacetone, pyridinecarboxylic acid, or salicylaldehyde to form paramagnetic, mononitrosyl complexes which were independently synthesised from the mononitrosyl precursor [Cr(eta-C5H5)(NO)-(mu-I)](2). The solid-state molecular structures of [Cr(eta-C5Me5)(NO)(2)(CF3SO3)] 2, [Cr(eta-C5H5)(NO)(2)(N2C5H7)] 9 and [Cr(eta-C5H4)(NO)(O2C5H7)] 10 were determined by X-ray crystallography. Crystals of 2 are monoclinic}, keywords = {ATOM TRANSFER, CHEMISTRY, COORDINATION, HYDROGEN, MECHANISTIC IMPLICATIONS, METHYLPALLADIUM(II) ALKOXIDE COMPLEXES, ORGANOMETALLIC CHEMISTRY, {antitumor agents}, isbn = {0300-9246}, url = {://A1997XZ14400027}, author = {Legzdins,Peter and Rettig, S. J. and Smith, K. M. and Tong, V. and Young, V. G.} } @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 = {://A1997WQ49000006}, author = {Caravan, P. and Rettig, S. J. and Orvig, Chris} } @article {4123, title = {{Synthesis, structure, and reactivity of [RuCl(PP)L]PF6 (PP = (PPh3)(2), Ph2P(CH2)(4)PPh2; L = P(py)(3), PPh(py)(2)}, journal = {Inorganic Chemistry}, volume = {36}, number = {25}, year = {1997}, note = {ISI Document Delivery No.: YK964Times Cited: 32Cited Reference Count: 43}, month = {Dec}, pages = {5809-5817}, type = {Article}, abstract = {{The complexes [RuCl(PPh3)(2)(P, N, N{\textquoteright}-PPh3-x(py)(x))]PF6 (x = 2, 1b; 3, 1c; py = 2-pyridyl) were isolated from the reaction of RuCl2(PPh3)(3) with 1 equiv of PPh3-x(py)(x) and NH4PF6 in acetone. Crystals of 1b (C52H43ClF6N2P4Ru) are monoclinic}, keywords = {2-(DIPHENYLPHOSPHINO)PYRIDINE, BRIDGING LIGAND, COORDINATION, HYDROFORMYLATION, palladium complexes, PHOSPHINE COMPLEXES, rhodium, RUTHENIUM(II) COMPLEXES}, isbn = {0020-1669}, url = {://A1997YK96400025}, author = {Schutte, R. P. and Rettig, S. J. and Joshi, A. M. and James, Brian R.} } @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 {3806, title = {Synthesis, characterization, and reactivity of a ruthenium(II) N,N{\textquoteright},N{\textquoteright}{\textquoteright}-tris(2-pyridyl)phosphine complex. X-ray analysis of RuCl2(PPh(3))(Ppy(3)) (py equals 2-pyridyl)}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {74}, number = {11}, year = {1996}, note = {ISI Document Delivery No.: WC124Times Cited: 10Cited Reference Count: 32}, month = {Nov}, pages = {2064-2072}, type = {Article}, abstract = {{Reaction of RuCl2(PPh(3))(3) with Ppy(3) (py = 2-pyridyl) in benzene produced the N,N{\textquoteright},N {\textquoteright}{\textquoteright}-Ppy(3) complex RuCl2(PPh(3))(Ppy(3)) 1. Crystals of RuCl2(PPh(3))(Ppy(3)). 2CH(2)Cl(2)(C35H31Cl6N3P2Ru) are monoclinic}, keywords = {COORDINATION, crystal structure, CRYSTAL-STRUCTURE, LIGANDS, MOLECULAR-STRUCTURES, phosphine, pyridylphosphines, ruthenium}, isbn = {0008-4042}, url = {://A1996WC12400022}, author = {Schutte, R. P. and Rettig, S. J. and James, Brian R.} } @article {3558, title = {GALLIUM AND INDIUM COMPLEXES OF HEXADENTATE LIGANDS CONTAINING PENDANT PYRIDYL AND PHENOLATE GROUPS}, journal = {Inorganic Chemistry}, volume = {34}, number = {11}, year = {1995}, note = {ISI Document Delivery No.: RA186Times Cited: 26Cited Reference Count: 42}, month = {May}, pages = {3057-3064}, type = {Article}, abstract = {{Gallium and indium complexes of N,N{\textquoteright}-bis(2-hydroxybenzyl)-N,N{\textquoteright}-bis(2-methylpyridyl)ethylenediami (H(2)bbpen), N,N{\textquoteright}-bis(S-bromo-2-hydroxybenzyl)-N,N-bis(2-methylpyridyl)ethylenediamin e (H(2)Bbbpen), and N,N{\textquoteright}-bis(5-chloro-2-hydroxybenzyl)-N,N-bis (2-methylpyridyl)ethylenediamine (H(2)Clbbpen) were prepared and characterized by spectroscopic techniques and crystallographic analyses. H(2)bbpen, H(2)Brbbpen, and H(2)Clbbpen were prepared in excellent yield by the reactions of 2-picolyl chloride with N,N{\textquoteright}-bis(2-hydroxybenzyl)ethylenediamine (H-2- bben),N,N{\textquoteright}-bis(S-bromo-2-hydroxybenzyl)ethylenediamine (HzBrbben), and N,N{\textquoteright}-bis(S-chloro-2-hydroxybenzyl)ethylenediamine (H(2)Clbben), respectively. Characterization of H(2)bbpen and its substituted analogs showed these compounds to be symmetrical about the ethylene moiety of the ethylenediamine backbone. This symmetry is maintained in the metal complexes of these compounds. There are six potential sites for coordination to a metal ion: two amine nitrogens, two phenolate oxygens, and two pyridyl nitrogens. A series of monocationic metal complexes were obtained from the reactions of Ga3+ and In3+ with H(2)bbpen, H(2)Brbbpen, and H(2)Clbbpen in the presence of 2 equiv of base (acetate). Crystals of [Ga(Clbbpen)]ClO4 are triclinic, of space group P ($) over bar 1, with 11.1563(6) Angstrom}, keywords = {aluminum, COBALT(III), COORDINATION, COPPER(II) COMPLEXES, CRYSTAL-STRUCTURES, IONS, metals}, isbn = {0020-1669}, url = {://A1995RA18600036}, author = {Wong, E. and Liu, S. and Rettig, S. J. and Orvig, Chris} } @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 {3436, title = {RHENIUM(V) AND TECHNETIUM(V) COMPLEXES OF BIS(O-HYDROXYPHENYL)PHENYLPHOSPHINE (PO2(2-)) AND (O-HYDROXYPHENYL)DIPHENYLPHOSPHINE (PO-) LIGANDS}, journal = {Inorganic Chemistry}, volume = {34}, number = {9}, year = {1995}, note = {ISI Document Delivery No.: QV824Times Cited: 52Cited Reference Count: 40}, month = {Apr}, pages = {2287-2299}, type = {Article}, abstract = {{A modified preparation of the hydrochloride adduct of the potentially tridentate ligand bis(o-hydroxyphenyl)-phenylphosphine (abbreviated H2PO2 . HCl) is described. From this ligand and a potentially bidentate analog, (o-hydroxyphenyl)diphenylphosphine (HPO), POxx- (x = 1, 2) complexes of rhenium(V) and technetium(V) were prepared by metathesis reactions with the appropriate metal(V) precursor and/or by reduction/ligand-exchange reactions with ammonium perrhenate or pertechnetate. The new complexes fall into four categories: bis(PO) complexes (MOCl(PO)(2)}, keywords = {CHEMISTRY, COORDINATION, RAY CRYSTAL-STRUCTURE, TERTIARY PHOSPHINES}, isbn = {0020-1669}, url = {://A1995QV82400008}, author = {Luo, H. Y. and Setyawati, I. and Rettig, S. J. and Orvig, Chris} } @article {2773, title = {PREPARATION AND CHARACTERIZATION OF THE OSMIUM CLUSTER COMPLEXES H2OS3(CO)8L(ETFCPCME) (L=CO OR PET2FC) AND H2OS3(CO)8[(ETA-C5H3PET2)FE(ETA-C5H4)]}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {71}, number = {3}, year = {1993}, note = {ISI Document Delivery No.: KU982Times Cited: 4Cited Reference Count: 35}, month = {Mar}, pages = {399-409}, type = {Article}, abstract = {{Thermolysis of Os3(CO)11](PEt2Fc) (Fc = (eta-C5H4)Fe(eta-C5H5)) in octane for 8 h affords H2Os3(CO)9(EtFcPCMe), 10, and H2Os3(CO)8[(eta-C5H3PEt2)Fe(eta-C5H4)], 9e, in 15 and 65\% yield, respectively. Heating Os3(CO),2 and PEt2Fc in 1:2 molar ratio in xylene for 10 h gives two isomers of H2Os3(CO)8(PEt2Fc)(EtFcPCMe), 11, in about 40\% yield. Two crystalline modifications of the complex 9e have been obtained from the same solvent: 9eA, triclinic}, keywords = {BENZYNE, BOND, CHEMISTRY, COMPOUND, COORDINATION, LIGANDS, MODE, RAY CRYSTAL-STRUCTURES, REACTIVITY, TRIOSMIUM CLUSTERS}, isbn = {0008-4042}, url = {://A1993KU98200020}, author = {Cullen, W. R. and Rettig, S. J. and Zheng, T. 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 {2774, title = {THERMOLYSIS OF OS3(CO)10[FE(ETA-C5H4PPRI2)2] - CRYSTAL AND MOLECULAR-STRUCTURES OF (MU-H)OS3(CO)8[MU-(ETA-C5H4PPRI2)FE(ETA-C5H4PPRICHMECH2CO)], (MU-H)OS3(CO)9[MU-(ETA-C5H4PPRI2)FE(ETA-C5H4PPRI)], AND (MU-H)2OS3(CO)8[ETA-3-MU-(ETA-C5H4PPRI2)FE(ETA-C5H3PPRI}, journal = {Organometallics}, volume = {12}, number = {3}, year = {1993}, note = {ISI Document Delivery No.: KR056Times Cited: 14Cited Reference Count: 30}, month = {Mar}, pages = {688-696}, type = {Article}, abstract = {{The pyrolysis of Os3(CO)10[Fc{\textquoteright}(PPri2)2] (Fc{\textquoteright} = (17-C5H4)2Fe) in octane for 7.5 h affords (mu-H)Os3(CO)8[mu-(eta-C5H4Pri2)Fe(eta-C5PriCHMeCH2CO)], 5, (mu-H)Os3(CO)9[mu-(eta-C5H4PPri2)Fe(eta-C5H4PPri)], 6, (mu-H)2083(CO)8[mu-[eta-C5H4Pri2)Fe(eta-C5H3PPri)], 7, (mu-H)083(CO)8[mu-(eta-C5H4PPri2) Fe(eta-C5H4PPriCHMeCH2CO)], 8, (mu-H)2083(CO)8[(eta-C5H4PPri2)Fe(eta-C5H3PPri)], 9, and (A-H)2Os3(CO)8[(eta-C5H4PPri)Fe(eta-C5H3PPri2)],10. X-ray data: 5,monoclinic,space group P2(1)/a (No. 14)}, keywords = {COMPLEXES, COORDINATION, OSMIUM, TRIOSMIUM CLUSTERS, X-ray structures}, isbn = {0276-7333}, url = {://A1993KR05600019}, author = {Cullen, W. R. and Rettig, S. J. and Zheng, T. C.} } @article {7264, title = {DESIGN AND SYNTHESIS OF MULTIDENTATE 2-(2{\textquoteright}-HYDROXYPHENYL)-2-THIAZOLINES FOR BIOMEDICAL APPLICATION}, journal = {Tetrahedron}, volume = {48}, number = {25}, year = {1992}, note = {ISI Document Delivery No.: JA148Times Cited: 13Cited Reference Count: 16}, month = {Jun}, pages = {5219-5226}, type = {Article}, abstract = {A variety of multidentate ligands based on the 2-(2{\textquoteright}-hydroxyphenyl)-2-thiazoline functionality have been synthesized by the formation of amide linkages at the carboxyl moiety in 2-(2{\textquoteright}-hydroxyphenyl)-2-thiazoline-4-carboxylic acid 1 with a number of polyamines, using DCC and/or CDI activation methodologies.}, keywords = {CHEMISTRY, COMPLEXES, COORDINATION, SIDEROPHORES, technetium}, isbn = {0040-4020}, url = {://A1992JA14800001}, author = {Hoveyda, H. R. and Karunaratne, V. and Orvig, Chris} } @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 {7313, title = {SYNTHESIS AND CHARACTERIZATION OF LANTHANIDE [LN(L)]2 COMPLEXES OF N4O3 AMINE PHENOL LIGANDS WITH PHENOLATE OXYGEN BRIDGES - EVIDENCE FOR VERY WEAK MAGNETIC EXCHANGE BETWEEN LANTHANIDE IONS}, journal = {Journal of the American Chemical Society}, volume = {114}, number = {15}, year = {1992}, note = {ISI Document Delivery No.: JE225Times Cited: 152Cited Reference Count: 37}, month = {Jul}, pages = {6081-6087}, type = {Article}, abstract = {{The synthesis and characterization of three potentially heptadentate (N4O3) amine phenols and of a series of their mononuclear and dinuclear lanthanide complexes are reported. The heptadentate ligands are KBH4 reduction products of the Schiff bases derived from the condensation reactions of tris(2-aminoethyl)amine with 3 equiv of one of salicylaldebyde (tris(((2-hydroxybenzyl)amino)ethyl)amine (H3L1)), 5-chlorosalicylaldehyde (tris(((2-hydroxy-5-chlorobenzyl)amino)ethyl)amine (H3L2)), and 5-bromosalicylaldehyde (tris(((2-hydroxy-5-bromobenzyl)amino)ethyl)amine (H3L3)). The reaction of an amine phenol with 1 equiv of a lanthanide (Ln) nitrate produces the mononuclear complex [Ln(H3L)(NO3)3]; homodinuclear complexes [Ln(L)]2 were obtained from the reaction of lanthanide salts with the respective ligand in the presence of a base (hydroxide or acetate). The X-ray structure of [Gd(L1)]2.2CHCl3 (H3L1 = tris(((2-hydroxybenzyl)amino)ethyl)amine) has been determined; it is the first structurally characterized example of an [Ln(L)]2 complex, a homodinuclear eight-coordinate lanthanide complex [Ln(L)]2 with heptadentate ligands only. The complex crystallizes as a chloroform solvate in the triclinic space group P1BAR with a = 12.002 (2) angstrom}, keywords = {ACID, CHEMISTRY, COORDINATION, CRYSTAL-STRUCTURES, MOLECULAR-STRUCTURE, SCHIFF-BASE LIGANDS, TETRAHYDRATE}, isbn = {0002-7863}, url = {://A1992JE22500028}, author = {Liu, S. and Gelmini, L. and Rettig, S. J. and Thompson, R. C. and Orvig, Chris} } @article {7313, title = {SYNTHESIS AND CHARACTERIZATION OF LANTHANIDE [LN(L)]2 COMPLEXES OF N4O3 AMINE PHENOL LIGANDS WITH PHENOLATE OXYGEN BRIDGES - EVIDENCE FOR VERY WEAK MAGNETIC EXCHANGE BETWEEN LANTHANIDE IONS}, journal = {Journal of the American Chemical Society}, volume = {114}, number = {15}, year = {1992}, note = {ISI Document Delivery No.: JE225Times Cited: 152Cited Reference Count: 37}, month = {Jul}, pages = {6081-6087}, type = {Article}, abstract = {{The synthesis and characterization of three potentially heptadentate (N4O3) amine phenols and of a series of their mononuclear and dinuclear lanthanide complexes are reported. The heptadentate ligands are KBH4 reduction products of the Schiff bases derived from the condensation reactions of tris(2-aminoethyl)amine with 3 equiv of one of salicylaldebyde (tris(((2-hydroxybenzyl)amino)ethyl)amine (H3L1)), 5-chlorosalicylaldehyde (tris(((2-hydroxy-5-chlorobenzyl)amino)ethyl)amine (H3L2)), and 5-bromosalicylaldehyde (tris(((2-hydroxy-5-bromobenzyl)amino)ethyl)amine (H3L3)). The reaction of an amine phenol with 1 equiv of a lanthanide (Ln) nitrate produces the mononuclear complex [Ln(H3L)(NO3)3]; homodinuclear complexes [Ln(L)]2 were obtained from the reaction of lanthanide salts with the respective ligand in the presence of a base (hydroxide or acetate). The X-ray structure of [Gd(L1)]2.2CHCl3 (H3L1 = tris(((2-hydroxybenzyl)amino)ethyl)amine) has been determined; it is the first structurally characterized example of an [Ln(L)]2 complex, a homodinuclear eight-coordinate lanthanide complex [Ln(L)]2 with heptadentate ligands only. The complex crystallizes as a chloroform solvate in the triclinic space group P1BAR with a = 12.002 (2) angstrom}, keywords = {ACID, CHEMISTRY, COORDINATION, CRYSTAL-STRUCTURES, MOLECULAR-STRUCTURE, SCHIFF-BASE LIGANDS, TETRAHYDRATE}, isbn = {0002-7863}, url = {://A1992JE22500028}, author = {Liu, S. and Gelmini, L. and Rettig, S. J. and Thompson, R. C. and Orvig, Chris} } @article {7209, title = {THERMOLYSIS OF RU3(CO)10[FE(ETA-C5H4PPRI2)2] - STRUCTURE OF RU3(CO)8(MU-H)2[ETA-PC5H4)FE(ETA-C5H4PPRI2)] AND RU3(CO)8(MU-H)(MU-OH)[MU-FE(ETA-C5H4PPRI2)2]}, journal = {Organometallics}, volume = {11}, number = {2}, year = {1992}, note = {ISI Document Delivery No.: HE298Times Cited: 21Cited Reference Count: 30}, month = {Feb}, pages = {853-858}, type = {Article}, abstract = {{Heating Ru3(CO)10(Fc{\textquoteright}(PPr(i)2)2) (Fc{\textquoteright} = Fe(eta-C5H4)2) in refluxing cyclohexane affords three products in moderate yields. The complex Ru3(CO)8(mu-H)2[(eta-PC5H4)Fe(eta-C5H4PPr(i)2)] (7) was characterized by X-ray diffraction. It crystallizes in the triclinic system, space group P1BAR, with a = 11.782 (4) angstrom}, keywords = {BENZYNE COMPLEXES, CLUSTER CHEMISTRY, COORDINATION, MOLECULAR-STRUCTURE, OSMIUM, RAY CRYSTAL-STRUCTURE, SURFACE, X-RAY}, isbn = {0276-7333}, url = {://A1992HE29800052}, author = {Cullen, W. R. and Rettig, S. J. and Zheng, T. C.} }