@article {5013,
	title = {alpha-agostic interactions in Cp*W(NO)(CH2CMe3)(2) and related nitrosyl complexes},
	journal = {Organometallics},
	volume = {20},
	number = {22},
	year = {2001},
	note = {ISI Document Delivery No.: 488TLTimes Cited: 22Cited Reference Count: 59},
	month = {Oct},
	pages = {4492-4501},
	type = {Article},
	abstract = {The solid-state molecular structure of Cp*W(NO)(CH2CMe3)(2) (1) has been shown to contain one "strongly agostic" and one "weakly agostic" methylene hydrogen atom by a neutron diffraction analysis at 120 K and by an X-ray diffraction analysis at -100 degreesC. The X-ray diffraction analysis of Cp*W(NO)(CH2SiMe3)(2) (2) at -20 degreesC reveals that its solid-state molecular structure possesses a crystallographically imposed mirror plane. Consequently, only the average existence of a relatively strong C-(HM)-M-... interaction for each hydrocarbyl ligand in 2 in the solid state can be established. The H-1 and gated C-13{H-1} NMR spectra of representative Cp{\textquoteright}M(NO)(R)(R{\textquoteright}) (M = Mo, W; R = hydrocarbyl, R{\textquoteright} = hydrocarbyl, halide, amide) complexes exhibit spectral parameters for the alpha -H and alpha -C atoms (i.e., delta (H), delta (C), Delta delta (H), DeltaJ(HC), and J(HW)) that provide evidence for the presence of a-agostic interactions in the molecular structures of these complexes in solution. The picture that has emerged from these investigations is that these complexes do adopt an a-agostic structure both in solution and in the solid state when secondary interactions such as pi -electron donation are weak (as in Cp*W(NO)(CH2CMe3)Cl), competitive (as in Cp*W(NO)(CH2CMe3)(CH2Ph)), or not possible (as in Cp*W(NO)(hydrocarbyl)(2) complexes generally). The bis(hydrocarbyl) complexes are probably stereochemically nonrigid in solution, as they appear to interconvert between the two limiting structures having one strongly agostic and one weakly agostic hydrocarbyl ligand. The neopentyl ligand forms alpha -agostic linkages with the metal centers in all neopentyl complexes studied, and these agostic interactions appear to be independent of the nature of the metal or the ancillary cyclopentadienyl ligand. Interestingly, the presence of these groundstate agostic interactions does not correlate with the tendency of the various compounds to undergo intramolecular alpha -H abstraction reactions and form reactive alkylidene complexes.},
	keywords = {ALKYL, C-H ACTIVATION, CARBON, COMPLEXES, CRYSTAL-STRUCTURE, DIALKYL COMPLEXES, hydride, HYDROGEN, MOLYBDENUM, TRANSITION-METAL BONDS, TUNGSTEN},
	isbn = {0276-7333},
	url = {<Go to ISI>://000171951700012},
	author = {Bau, R. and Mason, S. A. and Patrick, B. O. and Adams, C. S. and Sharp, W. B. and Legzdins,Peter}
}
@article {4407,
	title = {Metal-based chirality and spin state change in 16-electron CpML2 systems: a computational study of CpW(NO)(PH3)},
	journal = {Chemical Communications},
	number = {17},
	year = {1998},
	note = {ISI Document Delivery No.: 116QXTimes Cited: 11Cited Reference Count: 35},
	month = {Sep},
	pages = {1903-1904},
	type = {Article},
	abstract = {Density functional theory calculations indicate that CpW(NO)(PH3) possesses a planar triplet ground state, a result with significant implications for the inversion of configuration of 16e, d(6) CpML2 species.},
	keywords = {alkane, ALKYL, BOND ACTIVATION, C-H ACTIVATION, EFFECTIVE CORE POTENTIALS, INTERMEDIATE, IRIDIUM(III) COMPLEXES, METHANE, MOLECULAR CALCULATIONS, REACTIVITY},
	isbn = {1359-7345},
	url = {<Go to ISI>://000075737000060},
	author = {Smith, K. M. and Poli, R. and Legzdins,Peter}
}
@article {3918,
	title = {Unusual ligand-induced reductive elimination in Cp*W(NO)(H)[eta(2)-PPh(2)C(6)H(4)]: A route to the extremely strong pi-donor fragment Cp*W(NO)(PPh(3))},
	journal = {Journal of the American Chemical Society},
	volume = {119},
	number = {5},
	year = {1997},
	note = {ISI Document Delivery No.: WG232Times Cited: 25Cited Reference Count: 39},
	month = {Feb},
	pages = {1139-1140},
	type = {Article},
	keywords = {ACTIVATION, ALKYL, CARBON HYDROGEN-BONDS, COMPLEXES, hydride, ISOCYANIDE, MECHANISM, REACTIVITY, rhenium, TUNGSTEN},
	isbn = {0002-7863},
	url = {<Go to ISI>://A1997WG23200042},
	author = {Burkey, D. J. and Debad, J. D. and Legzdins,Peter}
}
@article {3415,
	title = {(eta(5)-cyclopentadienyl)oxo(peroxo-O,O{\textquoteright})-(trimethylsilylmethyl)tungsten and the related (eta(5)-pentamethylcyclopentadienyl)-oxo(peroxo-O,O{\textquoteright})(trimethylsilylmeth yl)-tungsten-tetracyanoethylene(2/1) complex},
	journal = {Acta Crystallographica Section C-Crystal Structure Communications},
	volume = {51},
	year = {1995},
	note = {ISI Document Delivery No.: TT225Times Cited: 4Cited Reference Count: 11Part 12},
	month = {Dec},
	pages = {2498-2501},
	type = {Article},
	abstract = {{The two organometallic molecules, [WO(C5H5)(C4H11Si)(O-2)] and [WO(C10H15)(C4H11Si)(O-2)] [2:1 complex with C6N4 (TCNE, ethenetetracafbonitrile)], have similar piano-stool structures and separate oxo and peroxo ligands [W-O(oxo) = 1.69(3) and 1.727(7), W-O(peroxo) = 1.91 (mean)},
	keywords = {ALKYL, TUNGSTEN},
	isbn = {0108-2701},
	url = {<Go to ISI>://A1995TT22500018},
	author = {Legzdins,Peter and Phillips, E. C. and Trotter, J. and Yee, V. C.}
}
@article {3415,
	title = {(eta(5)-cyclopentadienyl)oxo(peroxo-O,O{\textquoteright})-(trimethylsilylmethyl)tungsten and the related (eta(5)-pentamethylcyclopentadienyl)-oxo(peroxo-O,O{\textquoteright})(trimethylsilylmeth yl)-tungsten-tetracyanoethylene(2/1) complex},
	journal = {Acta Crystallographica Section C-Crystal Structure Communications},
	volume = {51},
	year = {1995},
	note = {ISI Document Delivery No.: TT225Times Cited: 4Cited Reference Count: 11Part 12},
	month = {Dec},
	pages = {2498-2501},
	type = {Article},
	abstract = {{The two organometallic molecules, [WO(C5H5)(C4H11Si)(O-2)] and [WO(C10H15)(C4H11Si)(O-2)] [2:1 complex with C6N4 (TCNE, ethenetetracafbonitrile)], have similar piano-stool structures and separate oxo and peroxo ligands [W-O(oxo) = 1.69(3) and 1.727(7), W-O(peroxo) = 1.91 (mean)},
	keywords = {ALKYL, TUNGSTEN},
	isbn = {0108-2701},
	url = {<Go to ISI>://A1995TT22500018},
	author = {Legzdins,Peter and Phillips, E. C. and Trotter, J. and Yee, V. C.}
}
@article {3296,
	title = {FACILE THERMAL REACTIVITY OF CP-ASTERISK-W(NO)(CH(2)SIME(3)) (CPH=CH2) - UNIQUE ALKANE C-H ACTIVATION UNDER MILD CONDITIONS},
	journal = {Journal of the American Chemical Society},
	volume = {117},
	number = {11},
	year = {1995},
	note = {ISI Document Delivery No.: QN458Times Cited: 18Cited Reference Count: 16},
	month = {Mar},
	pages = {3288-3289},
	type = {Note},
	keywords = {ALKYL, BONDS, COMPLEXES, CRYSTAL, DEHYDROGENATION, LIGAND},
	isbn = {0002-7863},
	url = {<Go to ISI>://A1995QN45800040},
	author = {Debad, J. D. and Legzdins,Peter and Lumb, S. A. and Batchelor, R. J. and Einstein, F. W. B.}
}
@article {2857,
	title = {CP{\textquoteright}M(NO)R2 - 16-ELECTRON PIANO-STOOL MOLECULES OF MOLYBDENUM AND TUNGSTEN},
	journal = {Accounts of Chemical Research},
	volume = {26},
	number = {2},
	year = {1993},
	note = {ISI Document Delivery No.: KM450Times Cited: 48Cited Reference Count: 37},
	month = {Feb},
	pages = {41-48},
	type = {Review},
	keywords = {ALKYL, COMPLEXES, CRYSTAL-STRUCTURES, LIGANDS, ORGANOMETALLIC NITROSYL CHEMISTRY},
	isbn = {0001-4842},
	url = {<Go to ISI>://A1993KM45000002},
	author = {Legzdins,Peter and Veltheer, J. E.}
}
@article {2730,
	title = {INSERTIONS OF HETEROCUMULENES INTO THE M-C SIGMA-BONDS OF CP-ASTERISK-M(NO)(ARYL)2 (M=MO, W) COMPLEXES},
	journal = {Organometallics},
	volume = {12},
	number = {10},
	year = {1993},
	note = {ISI Document Delivery No.: MC322Times Cited: 14Cited Reference Count: 32},
	month = {Oct},
	pages = {4234-4240},
	type = {Note},
	abstract = {{Treatment of the 16-valence-electron complexes Cp*M(NO)(aryl)2 (Cp* = eta5-C5Me5; M = Mo, W; aryl = phenyl (Ph), p-tolyl) with the heterocumulenes carbon disulfide, p-tolyl isocyanate, and carbon dioxide leads to the eta2-thiocarboxylate, eta2-amide-, and eta2-carboxylate-containing complexes, respectively, in 10-65\% isolated yields. Furthermore, Cp* W(NO) (eta2-S2C-Ph)(Ph) (1) reacts with trimethylphosphine to form Cp*W(NO)(eta2-S2C(PMe3)Ph)(Ph) (10), which contains a zwitterionic phosphonium betaine ligand. The solid-state molecular structure of 10-CH2Cl2 has been established by a single-crystal X-ray crystallographic analysis. Crystal data for Cp*W(NO)(eta2-S2C(PMe3)Ph)(Ph). CH2Cl2: monoclinic},
	keywords = {ALKYL, CARBON BONDS, CO2, H-BONDS, ORGANOMETALLIC NITROSYL CHEMISTRY, REACTIVITY, TUNGSTEN, WATER, X-ray structure},
	isbn = {0276-7333},
	url = {<Go to ISI>://A1993MC32200074},
	author = {Brouwer, E. B. and Legzdins,Peter and Rettig, S. J. and Ross, K. J.}
}
@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 {2853,
	title = {SYNTHESIS, CHARACTERIZATION, AND REACTIVITY OF ALKOXO COMPLEXES CONTAINING CP-ASTERISK-M(NO) GROUPS (M=MO, W)},
	journal = {Organometallics},
	volume = {12},
	number = {9},
	year = {1993},
	note = {ISI Document Delivery No.: LX172Times Cited: 11Cited Reference Count: 29},
	month = {Sep},
	pages = {3545-3552},
	type = {Article},
	abstract = {{Stepwise treatment of Cp*M(NO)Cl2 [CP* = eta5-C5Me5;M = Mo,W] in THF at low temperatures with 2 equiv of alkoxide anion affords first Cp*M(NO)(OR)CI complexes and then the bis(alkoxo) compounds Cp*M(NO)(OR)2 [M = Mo},
	keywords = {ALKYL, MOLYBDENUM, ORGANOMETALLIC NITROSYL CHEMISTRY, PI-DONATION, TUNGSTEN},
	isbn = {0276-7333},
	url = {<Go to ISI>://A1993LX17200029},
	author = {Legzdins,Peter and Lundmark, P. J. and Rettig, S. J.}
}
@article {7231,
	title = {PHOSPHINE COMPLEXES OF ZIRCONIUM AND HAFNIUM - SYNTHESIS, STRUCTURE, AND FLUXIONAL BEHAVIOR OF THE TRIMETHYL DERIVATIVES MME3[N(SIME2CH2PR2)2] (R = ME, ISO-PR, TERT-BU) - EVIDENCE FOR A BICAPPED-TETRAHEDRAL GEOMETRY},
	journal = {Organometallics},
	volume = {11},
	number = {1},
	year = {1992},
	note = {ISI Document Delivery No.: GZ040Times Cited: 17Cited Reference Count: 31},
	month = {Jan},
	pages = {469-472},
	type = {Note},
	abstract = {The addition of 3 equiv of methyl Grignard (MeMgCl) to the amidodiphosphine derivatives MCl3[N-(SiMe2CH2PR2)2] (M = Zr, Hf; R = Me, Pr(i), Bu(t)) generates the corresponding trimethyl complexes MMe3[N-(SiMe2CH2PR2)2]. The solution structures and fluxional behavior of these molecules along with the X-ray structure of HfMe3[N(SiMe2CH2PMe2)2] are presented.},
	keywords = {ALKYL, CARBON BOND, DINITROGEN, ETHYLENE POLYMERIZATION, GROUP-4, HYDRIDE DERIVATIVES, INSERTION, RAY CRYSTAL-STRUCTURE, REDUCTION, TITANIUM},
	isbn = {0276-7333},
	url = {<Go to ISI>://A1992GZ04000078},
	author = {Fryzuk,Michael D. and Carter, A. and Rettig, S. J.}
}
@article {7014,
	title = {PHOSPHINE COMPLEXES OF YTTRIUM, LANTHANUM, AND LUTETIUM - SYNTHESIS, THERMOLYSIS, AND FLUXIONAL BEHAVIOR OF THE HYDROCARBYL DERIVATIVES MR{\textquoteright}[N(SIME2CH2PME2)2]2 - X-RAY CRYSTAL-STRUCTURE OF Y[N(SIME2CHPME2)(SIME2CH2PME2)][N(SIME2CH2PME2)2]},
	journal = {Organometallics},
	volume = {10},
	number = {6},
	year = {1991},
	note = {ISI Document Delivery No.: FQ933Times Cited: 61Cited Reference Count: 41},
	month = {Jun},
	pages = {2026-2036},
	type = {Article},
	abstract = {{The preparation of phosphine complexes of the group 3 elements yttrium and lanthanum and the lanthanide metal lutetium is described. The reaction of 2 equiv of lithium salt of the mixed-donor ligand LiN(SiMe2CH2PR2)2 (R = Me, Ph, Pr(i)) with YCl3 or LuCl3 (R = Me only) leads to the formation of the bis(ligand) complexes MCl[N(SiMe2CH2PR2)2]2. The analogous lanthanum derivative requires the use of the corresponding potassium salt KN(SiMe2CH2PR2)2 (R = Me, Ph) with anhydrous LaCl3 to generate good yields of LaCl(N(SiMe2CH2PR2)2]2. Replacement of the remaining chloride with a hydrocarbyl ligand can be achieved for M = Y and Lu to generate MR[N(SiMe2CH2PMe2)2]2 (M = Y},
	keywords = {ALKYL, BOND ACTIVATION, CHEMISTRY, CRYSTALLOGRAPHIC CHARACTERIZATION, ELIMINATION, F-BLOCK METALS, HAFNIUM(IV), hydride, LIGAND, ORGANOLANTHANIDES},
	isbn = {0276-7333},
	url = {<Go to ISI>://A1991FQ93300059},
	author = {Fryzuk,Michael D. and Haddad, T. S. and Rettig, S. J.}
}
@article {7100,
	title = {PHOTOCHEMISTRY OF MACROCYCLIC KETONES WITHIN ZEOLITES - COMPETITION BETWEEN NORRISH TYPE-I AND TYPE-II REACTIVITY},
	journal = {Tetrahedron Letters},
	volume = {32},
	number = {52},
	year = {1991},
	note = {ISI Document Delivery No.: GX962Times Cited: 9Cited Reference Count: 32},
	month = {Dec},
	pages = {7675-7678},
	type = {Article},
	abstract = {Photolysis of macrocyclic mono- and diketones (1 and 2) included in X and Y zeolites gives Norrish type I products in addition to the products obtained via the Norrish type II process, the only observed process in isotropic media. Enhancement of the type I over the type II process is cation-dependent and especially large enhancements are obtained with Li and Na as cations. The zeolite effect is attributed to a reduction in the rate of the Norrish type II gamma-hydrogen abstraction process.},
	keywords = {ALKANONES, ALKYL, ALPHA-CLEAVAGE, DIBENZYL KETONES, FAUJASITES, KETONES, photolysis, TEMPERATURE-DEPENDENCE},
	isbn = {0040-4039},
	url = {<Go to ISI>://A1991GX96200012},
	author = {Ramamurthy, V. and Lei, X. G. and Turro, N. J. and Lewis, T. J. and Scheffer, J. R.}
}
