@article {609,
	title = {Interaction of rhodium(I) bisphosphine complexes with semicarbazones to give orthometallated rhodium(III) complexes},
	journal = {Russian Chemical Bulletin},
	volume = {52},
	number = {12},
	year = {2003},
	note = {ISI Document Delivery No.: 809IUTimes Cited: 7Cited Reference Count: 57International Memorial Symposium on Modern Trends in Organometallic and Catalytic Chemistry Dedicated to Mark Vol{\textquoteright}pinMAY 18-AUG 23, 2003Moscow, RUSSIA},
	month = {Dec},
	pages = {2707-2714},
	type = {Proceedings Paper},
	abstract = {Interaction of the cis-[Rh(PR3)(2)(Solv)(2)]PF6 complexes (R = Ar or R-3 = Ph2Me, Solv solvent) under Ar with semicarbazones bearing a phenyl group on the imine-C atom gives the rhodium(III)-hydrido-bis(phosphine)-orthometallated semicarbazone species [RhH(PR3)(2){(o-C6H4(R{\textquoteright})C=N-N(H)CONH2}]PF6 (R{\textquoteright} = Me or Et), which are characterized generally by elemental analysis, P-31{H-1} and H-1 NMR spectroscopy, and mass-spectrometry. The PPh3-containing complex with R{\textquoteright} = Me, structurally characterized by X-ray analysis, reveals coordination of the semicarbazone by the ortho-C atom, the imine-N atom, and the amide-carbonyl group. For a semicarbazone containing no Ph group, the rhodium(I) complex [Rh(PR3)(2)(Et(Me)C=N-N(H)CONH2)]PF6, containing the eta(2)-semicarbazone bonded via the imine-N and carbonyl, is formed. Attempts to hydrogenate the C=N moiety in the complexes or to catalytically hydrogenate the semicarbazones were unsuccessful.},
	keywords = {ACTIVATION, ASYMMETRIC HYDROGENATION, BENZALDEHYDE SEMICARBAZONE, C-H, C-H BONDS, CATALYTIC-HYDROGENATION, COMPLEXES, CRYSTAL-STRUCTURE, FINE CHEMICALS, INTRAMOLECULAR ACTIVATION, molecular structure, orthometallation, phosphines, rhodium, SELECTIVE HYDROGENATION, semicarbazones, SYNTHESIS, TRANSITION-METAL-COMPLEXES, UNPRECEDENTED CHEMICAL TRANSFORMATION},
	isbn = {1066-5285},
	url = {<Go to ISI>://000220631200019},
	author = {Ezhova, M. B. and Patrick, B. O. and James, Brian R. and Ford, M. E. and Waller, E. J.}
}
@article {5077,
	title = {Macrocyclic complexes of niobium(III): Synthesis, structure, and magnetic behavior of mononuclear and dinuclear species that incorporate the [P2N2] system},
	journal = {Organometallics},
	volume = {20},
	number = {17},
	year = {2001},
	note = {ISI Document Delivery No.: 464CMTimes Cited: 12Cited Reference Count: 72},
	month = {Aug},
	pages = {3752-3761},
	type = {Article},
	abstract = {{The coordination chemistry of the two mixed donor macrocyclic ligands (R)[P2N2] (where (R)[P2N2] = RP(CH2SiMe2NSiMe2CH2)(2)PR},
	keywords = {= PHP(CH2SIME2NSIME2CH2)(2)PPH, AMIDE, ARENE HYDROGENATION, BOND, C-H, CRYSTAL-STRUCTURES, DERIVATIVES, MOLECULAR-STRUCTURE, N BOND-CLEAVAGE, TRIPLE, X-ray structures},
	isbn = {0276-7333},
	url = {<Go to ISI>://000170515600024},
	author = {Fryzuk,Michael D. and Kozak, C. M. and Bowdridge, M. R. and Jin, W. C. and Tung, D. and Patrick, B. O. and Rettig, S. J.}
}
@article {5076,
	title = {Reaction of [P2N2]Ta=CH2(Me) with ethylene: Synthesis of [P2N2]Ta(C2H4)Et, a neutral species with a beta-agostic ethyl group in equilibrium with an alpha-agostic ethyl group ([P2N2] = PhP(CH2SiMe2NSiMe2CH2)(2)PPh)},
	journal = {Journal of the American Chemical Society},
	volume = {123},
	number = {8},
	year = {2001},
	note = {ISI Document Delivery No.: 405LXTimes Cited: 26Cited Reference Count: 65},
	month = {Feb},
	pages = {1602-1612},
	type = {Article},
	abstract = {The photolysis of [P2N2]TaMe3 ([P2N2] = PhP(CH2SiMe2NSiMe2CH2)(2)PPh) produces [P2N2]Ta=CH2(Me) as the major product. The thermally unstable methylidene complex decomposes in solution in the absence of trapping agents to unidentified products. However, in the presence of ethylene [P2N2]Ta=CH2(Me) is slowly converted to [P2N2]Ta(C2H4)Et, with [P2N2]Ta(C2H4)Me observed as a minor product. A mechanistic study suggests that the formation of [P2N2]Ta(C2H4)Et results from the trapping of [P2N2]TaEt, formed by the migratory insertion of the methylene moiety into the tantalum-methyl bond. The minor product, [P2N2]Ta(C2H4)Me, forms from the decomposition of a tantalacyclobutane resulting from the addition of ethylene to [P2N2]Ta=CH2(Me) and is accompanied by the production of an equivalent of propylene. Pure [P2N2]Ta(C2H4)Et can be synthesized by hydrogenation of [P2N2]TaMe3 in the presence of PMe3, followed by the reaction bf ethylene with the resulting trihydride. Crystallographic and NMR data indicate the presence of a beta -agostic interaction between the ethyl group and tantalum center in [P2N2]Ta(C2H4)Et. Partially deuterated analogues of [P2N2]Ta(C2H4)Et show a large isotopic perturbation of resonance for both the beta -protons and the alpha -protons of the ethyl group, indicative of an equilibrium between a beta -agostic and an a-agostic interaction for the ethyl group in solution. An EXSY spectrum demonstrates that an additional fluxional process occurs that exchanges all of the H-1 environments of the ethyl and ethylene ligands. The mechanism of this exchange is believed to involve the direct transfer of the beta -agostic hydrogen atom from the ethyl group to the ethylene ligand, via the so-called beta -hydrogen transfer process.},
	keywords = {ALKYL ALKENE, C-H, CHAIN PROPAGATION, COMPLEXES, METAL-CARBON BONDS, MIGRATORY INSERTION, MOLECULAR-STRUCTURES, NUCLEAR-MAGNETIC-RESONANCE, OLEFIN, POLYMERIZATION, RAY CRYSTAL-STRUCTURE, TRANSITION-METALS},
	isbn = {0002-7863},
	url = {<Go to ISI>://000167162100008},
	author = {Fryzuk,Michael D. and Johnson, S. A. and Rettig, S. J.}
}
@article {4325,
	title = {Ligand elaboration mediated by a Cp*W(NO) template: Stepwise incorporation of small molecules into a tungsten vinyl fragment},
	journal = {Organometallics},
	volume = {17},
	number = {5},
	year = {1998},
	note = {ISI Document Delivery No.: ZC012Times Cited: 21Cited Reference Count: 81},
	month = {Mar},
	pages = {854-871},
	type = {Article},
	abstract = {{Thermolysis of the alkyl vinyl complex Cp*W(NO)(CH2SiMe3)(CPh=CH2) (1) in the presence of unsaturated, heteroatom-containing compounds such as esters and nitriles quantitatively affords metallacyclic products of reductive coupling. These are trapped as 18e complexes via either intramolecular rearrangement or intermolecular reaction with added trapping reagents. The nature of these metallacycles is consistent with the intermediacy of the acetylene complex Cp*W(NO)(eta(2)-CPh=CH) (A) derived in situ from the reductive elimination of SiMe4 from 1. With esters ROAc (R = Me, Et), reductive coupling and C-O bond cleavage yields the alkoxide-containing oxametallacyclopentadiene complexes Cp*W-(No)(eta(2)-O=C(Me)CH=CPh)(OR) (2},
	keywords = {ACTIVATION, ALKYNE COMPLEXES, BOND-CLEAVAGE, C-H, INSERTION, KETONE COMPLEXES, METAL-COMPLEXES, ORGANIC-SYNTHESIS, ORGANOMETALLIC NITROSYL CHEMISTRY, RAY CRYSTAL-STRUCTURE, SEQUENTIAL, ZIRCONOCENE COMPLEXES},
	isbn = {0276-7333},
	url = {<Go to ISI>://000072530700014},
	author = {Legzdins,Peter and Lumb, S. A. and Young, V. G.}
}
@article {2778,
	title = {REACTIVITY OF THE LEWIS-ACIDS CP-ASTERISK-M(NO)(CH2CME3)CL [M = MO, W] AND RELATED COMPLEXES},
	journal = {Organometallics},
	volume = {12},
	number = {7},
	year = {1993},
	note = {ISI Document Delivery No.: LU682Times Cited: 26Cited Reference Count: 43},
	month = {Jul},
	pages = {2714-2725},
	type = {Article},
	abstract = {{Treatments of Cp*M(NO)Cl2 [Cp* = eta5-C5Me5; M = Mo, W] with 0.5 equiv of (Me3CCH2)2Mg.X(dioxane) in THF at low temperatures affords the monoalkylated complexes, Cp*M(NO)(CH2CMe3)Cl (1, 1{\textquoteright}). Exposure to a second 0.5 equiv of (Me3CCH2)2Mg.X(dioxane) at higher temperatures produces the dialkyl complexes, Cp*M(NO)(CH2CMe3)2 (2,2{\textquoteright}). Utilizing the two series of Cp*M(NO)Cl2, Cp*M(NO)(CH2CMe3)Cl and Cp*M(NO)(CH2CMe3)2 complexes, the relative electron deficiencies in these 16-electron complexes can be assessed spectroscopically and electrochemically. Without exception, the Mo complexes are the stronger Lewis acids. Also, the mononeopentyl derivatives for both metals are more reactive toward a variety of substrates than are their bis(neopentyl) analogues. Complexes 1 and 1{\textquoteright} serve as precursors to mixed alkyl and alkyl aryl complexes (3, 3{\textquoteright}, 4, 4{\textquoteright}) and yield metal-centered adducts with PMe3 and pyridine (5, 5{\textquoteright}, 6, 6{\textquoteright}). CO and CNCMe3 readily insert into the M-C bonds of 1 and 1{\textquoteright}. The insertion products, Cp*M(NO)(C{E}CH2CMe3)Cl (7, 7{\textquoteright}},
	keywords = {ALKYL, C-H, CARBONYLATION, CONVERSION, DERIVATIVES, H ACTIVATION REACTIONS, MIGRATORY INSERTION, MOLYBDENUM, ORGANOMETALLIC NITROSYL CHEMISTRY, TUNGSTEN},
	isbn = {0276-7333},
	url = {<Go to ISI>://A1993LU68200046},
	author = {Debad, J. D. and Legzdins,Peter and Rettig, S. J. and Veltheer, J. E.}
}
@article {7015,
	title = {THERMAL AND PHOTOCHEMICAL-TRANSFORMATIONS OF ORGANOIRIDIUM PHOSPHIDE COMPLEXES - MECHANISTIC STUDIES ON CARBON PHOSPHORUS BOND FORMATION TO GENERATE CYCLOMETALATED HYDRIDE COMPLEXES BY ALPHA-HYDRIDE ABSTRACTION},
	journal = {Journal of the American Chemical Society},
	volume = {113},
	number = {23},
	year = {1991},
	note = {ISI Document Delivery No.: GP037Times Cited: 28Cited Reference Count: 62},
	month = {Nov},
	pages = {8724-8736},
	type = {Article},
	abstract = {{The thermal and photolytic transformations of a series of methyliridium(III) phosphide complexes are described. Complexes of the formula Ir(CH3)PR2[N(SiMe2CH2PPh2)2] (R = Ph, Me) rearrange thermally to generate the corresponding cyclometalated derivatives fac-Ir(eta-2-CH2PR2)H[N(SiMe2CH2PPh2)2]; continued thermolysis results in the formation of the iridium(I) phosphine complexes Ir(PMeR2)[N(SiMe2CH2PPh2)2]. Under photolytic conditions the phosphide derivatives rearrange directly to the phosphine complexes with no observable intermediates. The phenylphosphide complex Ir(CH3)PHPh[N-(SiMe2CH2PPh2)2] rearranges directly to the phosphine derivative Ir(PHPhMe)[N(SiMe2CH2PPh2)2] both thermally and photolytically with no observable intermediates. Crystals of lr(CH3)PPh2[N(SiMe2CH2PPh2)2] are monoclinic with a = 13.506 (3) angstrom},
	keywords = {ACTIVATION, C-H, CHEMISTRY, CRYSTAL-STRUCTURE, DERIVATIVES, HYDROGEN-BONDS, IRIDIUM, LIGAND, REACTIVITY, REDUCTIVE ELIMINATION},
	isbn = {0002-7863},
	url = {<Go to ISI>://A1991GP03700020},
	author = {Fryzuk,Michael D. and Joshi, K. and Chadha, R. K. and Rettig, S. J.}
}
