@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 = {<Go to ISI>://000231928800024},
	author = {Morello, L. and Yu, P. H. and Carmichael, C. D. and Patrick, B. O. and Fryzuk,Michael D.}
}
@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 = {<Go to ISI>://000184093300036},
	author = {Fryzuk,Michael D. and Shaver, M. P. and Patrick, B. O.}
}
@article {617,
	title = {Dinuclear organometallic dinitrogen complexes of niobium},
	journal = {Inorganica Chimica Acta},
	volume = {345},
	year = {2003},
	note = {ISI Document Delivery No.: 653EUTimes Cited: 4Cited Reference Count: 30},
	month = {Mar},
	pages = {53-62},
	type = {Article},
	abstract = {{The niobium(III) chloride precursors (R)[P2N2]NbCl stabilized by the bis-(amidophosphine) macrocycle (where (R)[P2N2] RP(CH2SiMe2NSiMe2CH2)(2)PR},
	keywords = {ACTIVATION, amidophosphine ligands, AZOBENZENE, CLEAVAGE, CRYSTAL-STRUCTURE, CRYSTALLOGRAPHY, DINITROGEN COMPLEXES, END-ON, FIXATION, fluxionality, macrocycle, macrocycles, N-2, NIOBIUM, NITRIDE, SIDE-ON},
	isbn = {0020-1693},
	url = {<Go to ISI>://000181422900008},
	author = {Fryzuk,Michael D. and Kozak, C. M. and Patrick, B. O.}
}
@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 = {<Go to ISI>://000187035400001},
	author = {Shaver, M. P. and Thomson, R. K. and Patrick, B. O. and Fryzuk,Michael D.}
}
@article {393,
	title = {Differing reactivities of (trimpsi)M(CO)(2)(NO) complexes [M = V, Nb, Ta; trimpsi = (BuSi)-Bu-t(CH2PMe2)(3)] with halogens and halogen sources},
	journal = {Inorganic Chemistry},
	volume = {41},
	number = {21},
	year = {2002},
	note = {ISI Document Delivery No.: 605KHTimes Cited: 11Cited Reference Count: 55},
	month = {Oct},
	pages = {5388-5396},
	type = {Article},
	abstract = {Treatment of (trimpsi)V(CO)(2)(NO) (trimpsi = (BuSi)-Bu-t(CH2PMe2)(3)) with 1 equiv of PhlCl(2) or C2Cl6 or 2 equiv of AgCl affords (trimpsi)V(NO)Cl-2 (1) in moderate yields. Likewise, (trimpsi)V(NO)Br-2 (2) and (trimpsi)V(NO)\(2) (3) are formed by the reactions of (trimpsi)V(CO)(2)(NO) with Br-2 and l(2), respectively. The complexes (trimpsi)M(NO)l(2)(PMe3) (M = Nb, 4; Ta, 5) can be isolated in moderate to low yields when the (trimpsi)M(CO)(2)(NO) compounds are sequentially treated with 1 equiv of l(2) and excess PMe3. The reaction of (trimpsi)V(CO)(2)(NO) with 2 equiv of CINO forms 1 in low yield, but the reactions of (trimpsi)M(CO)(2)(NO) (M = Nb, Ta) with 1 equiv of CINO generate (trimpsi)M(NO)(2)Cl (M = Nb, 6; Ta, 7). Complexes 6 and 7 are thermally unstable and decompose quickly at room temperature; consequently, they have been characterized solely by IR and P-31{H-1} NMR spectroscopies. All other new complexes have been fully characterized by standard methods, and the solid-state molecular structures of 1.3CH(2)Cl(2), 4.(3/ 4)CH2Cl2, and 5.THF have been established by single-crystal X-ray diffraction analyses. A convenient method of generating (ClNO)-N-15 has also been developed during the course of these investigations.},
	keywords = {CHEMISTRY, CRYSTAL-STRUCTURE, DISPROPORTIONATION REACTIVITY, NIOBIUM, NITRIC-OXIDE, NITROSYL COMPLEXES, NO, tantalum, TROPOCORONAND, VANADIUM},
	isbn = {0020-1669},
	url = {<Go to ISI>://000178676700012},
	author = {Hayton, T. W. and Legzdins,Peter and Patrick, B. O.}
}
@article {4543,
	title = {Mechanistic studies of the formation of zirconium alkylidene complexes [eta(5)-C5H3-1,3-(SiMe2CH2PPr2i)(2)]Zr=CHR(Cl) (R = Ph, SiMe3)},
	journal = {Journal of the American Chemical Society},
	volume = {121},
	number = {11},
	year = {1999},
	note = {ISI Document Delivery No.: 180AUTimes Cited: 33Cited Reference Count: 32},
	month = {Mar},
	pages = {2478-2487},
	type = {Article},
	abstract = {The reaction of [P2Cp]ZrCl3 (1) with 2 equiv of KCH2Ph generates an equilibrium mixture of alkyl complexes consisting of [P2Cp]ZrCl2(CH2Ph) (2), [P2Cp]ZrCl(CH2Ph)(2) (3), and [P2Cp]Zr(CH2Ph)(3) (4). Thermolysis of this mixture yields the alkylidene complex [P2Cp]Zr=CHPh(Cl) (5) in 85\% overall yield. Kinetic studies reveal a composite mechanism that incorporates the above preequilibrium, followed by an intramolecular alpha-abstraction reaction of dibenzyl 3 which follows a first-order rate, with the rate parameters Delta H double dagger = 19(1) kcal mol(-1) and Delta S double dagger = -22(5) cal(-1) mol K-1. A kinetic isotope effect of 3.0(5) was measured at 70 degrees C for the perdeuterated analogue [P2Cp]ZrCl(CD2C6D5)2. The reaction of 1 with 2 equiv of LiCH2-EMe3 (E = C, Si) produces a similar equilibrium mixture as observed for the benzyl analogues, consisting of [P2Cp]ZrCl2(CH2EMe3) (7), [P2Cp]Zr(CH2EMe3)(3) (8), and [P2Cp]ZrCl(CH2EMe3)(2) (9). Thermolysis of this mixture yields [P2Cp]Zr=CHEMe3(Cl) (6). A kinetic analysis conducted on 9 (E = Si) indicated a first-order reaction from which the activation parameters Delta H double dagger = 6(1) kcal mol(-1) and Delta S double dagger = -62(5) cal mol(-1) K-1 were obtained. The results indicate that reaction rates follow the order CH2Ph > CH2SiMe3 > CH2CMe3, an exact reversal of the trend for the homoleptic Ta systems Ta(CH2R)(5). The role of phosphine coordination is discussed to account for this trend. A crystal structure determination obtained for 6b reveals an alpha-agnostic interaction and a structure analogous to that of 5.},
	keywords = {ALPHA-HYDROGEN ABSTRACTION, CHEMISTRY, LIGAND, METAL-CARBON BONDS, NIOBIUM, OPENING METATHESIS POLYMERIZATION, tantalum, THERMOLYSIS, TITANIUM ALKYLIDENES, TITANOCENE},
	isbn = {0002-7863},
	url = {<Go to ISI>://000079363300019},
	author = {Fryzuk,Michael D. and Duval, P. B. and Mao, Sssh and Zaworotko, M. J. and Macgillivray, L. R.}
}
