@article {2528,
	title = {Synthesis and Characterization of a New Thiophene-Bridged Diamidophosphine [NPN] Donor Set and Its Coordination Chemistry with Zirconium(IV): Unexpected Deprotonation-Lithiation Sequence with a Mesitylaminothiophene Precursor},
	journal = {Organometallics},
	volume = {28},
	number = {17},
	year = {2009},
	note = {ISI Document Delivery No.: 489MMTimes Cited: 1Cited Reference Count: 43Menard, Gabriel Jong, Howard Fryzuk, Michael D.},
	month = {Sep},
	pages = {5253-5260},
	type = {Article},
	abstract = {The synthesis and characterization of the thiophene-bridged diamidophosphine proligand [NPN]H-S(2) (2) (where [NPN]H-S(2) = {[N-(2,4,6-Me3C6H2)(3-NH-SC4H2-2-)](2)PPh}) along with several [NPN](ZrX2)-Zr-S (X = NMe2, Cl, I) complexes are presented. The ligand precursor [NPN]H-S(2) was prepared from N-(2,4,6-Me3C6H2)(3-NH-4-Br-SC4H2) (1),(BuLi)-Bu-t, and PhPCl2 in Et2O in 50\% yield; the stereochemistry of the ligand precursor was unexpected and likely resulted from a competitive bromine-lithium exchange and deprotonation sequence with the thiophene starting material I and (BuLi)-Bu-t. A mechanism to rationalize the observed stercochemistry of the product is proposed following deuteration experiments. [NPN]Zr-S(NMe2)(2) (8) can be prepared in 80\% yield by the direct reaction of [NPN]H-S(2) and Zr(NMe2)(4) in toluene. Both [NPN](ZrCl2)-Zr-S (9) and [NPN](ZrI2)-Zr-S (10) are prepared in high yield by the reaction of 8 with excess Me3SiCl or Me3SiI, respectively.},
	keywords = {DIARYLAMIDO-PHOSPHINE-LIGANDS, DIRECTED ORTHO-LITHIATION, END-ON, hafnium, HALOGEN EXCHANGE, lithium, METAL-COMPLEXES, MOLECULAR NITROGEN, ON-BOUND DINITROGEN, PALLADIUM-CATALYZED AMINATION, SIDE-ON},
	isbn = {0276-7333},
	url = {<Go to ISI>://000269424200046},
	author = {Menard, G. and Jong, H. and Fryzuk,Michael D.}
}
@article {483,
	title = {Studies toward the synthesis of contignasterol: Functionalization of the steroidal A,B ring system},
	journal = {Synthetic Communications},
	volume = {32},
	number = {19},
	year = {2002},
	note = {ISI Document Delivery No.: 595TJTimes Cited: 2Cited Reference Count: 12},
	pages = {2991-3002},
	type = {Article},
	abstract = {The synthesis of androstane-3alpha,4beta,6alpha,7beta-tetrol-17-one (2), a potentially key intermediate for the preparation of contignasterol (1), was achieved by functionalization of the A,B-ring portion or the readily available androst-4-ene-3,17-dione (3).},
	keywords = {EPOXIDATION, lithium, ring opening, stereoselective reduction, steroid},
	isbn = {0039-7911},
	url = {<Go to ISI>://000178124600011},
	author = {Rogers, C. and Shen, Y. P. and Burgoyne, D. and Piers, E.}
}
@article {5078,
	title = {Synthesis, structure, and reactivity of diamidophosphine complexes of yttrium and the lanthanides},
	journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie},
	volume = {79},
	number = {7},
	year = {2001},
	note = {ISI Document Delivery No.: 473RETimes Cited: 10Cited Reference Count: 17},
	month = {Jul},
	pages = {1194-1200},
	type = {Article},
	abstract = {The reaction of the dilithiodiamidophosphine ligand precursor PhP(CH2SiMe2NPh)(2)Li-2(THF)(2)([NPN]Li-2(THF)(2)) with LnCl(3)(THF)(3) (Ln = Y, Sm, Ho. Yb. Lu; THF = tetrahydrofuran) in refluxing toluene generates the mononuclear complexes [NPN]LnCI(THF) in good yield. The molecular structures have been shown to be five-coordinate in the solid state and in solution. Attempts to prepare alkyl derivatives have only met with partial success; the reaction of MeMgCl with [NPN]YCl(THF) generates the partially characterized mixed-metal derivative [NPN]YMe2MgCl. The reaction with LiAlH4 results in complete ligand exchange and the formation of the tetranuclear lithium aluminum hydride derivative ([NPN]AlH2Li(THF))(2). Reduction of the lutetium derivative with KC8 and naphthalene generated the dinuclear naphthalene-bridged species {[NPN]Lu}(2)(mu-eta (4):eta (4)-C10H8) wherein each Lu centre engages in eta (4)-coordination to opposite sides of the arene moiety. X-ray crystallography was used to characterize the four complexes.},
	keywords = {aluminum, BRIDGING N-2 UNIT, CATALYSTS, CRYSTAL-STRUCTURE, DINITROGEN, F-BLOCK METALS, lanthanides, LIGAND, lithium, mixed-donor ligands, NAPHTHALENE, OLEFIN POLYMERIZATION, SIDE-ON, TERTIARY PHOSPHINE COMPLEXES, YTTRIUM},
	isbn = {0008-4042},
	url = {<Go to ISI>://000171061200016},
	author = {Fryzuk,Michael D. and Yu, P. H. and Patrick, B. O.}
}
@article {4052,
	title = {The versatility of lithium reagents in synthetic organometallic chemistry: Their differing reactions with [(CpMo)-Mo-*(NO)(CH2SiMe3)(2)]},
	journal = {Chemistry-a European Journal},
	volume = {3},
	number = {10},
	year = {1997},
	note = {ISI Document Delivery No.: YA856Times Cited: 13Cited Reference Count: 44},
	month = {Oct},
	pages = {1579-1587},
	type = {Article},
	abstract = {[Cp*Mo(NO)(CH2SiMe3)(2)] exhibits three principal types of reaction with the various lithium reagents investigated during this study, namely: regioselective deprotonation, reduction, and addition. Deprotonation of the reactant, achieved by treatment with lithium amide reagents, leads ultimately to the formation of the alkylidene {\textquoteright}{\textquoteright}ate{\textquoteright}{\textquoteright} complex [Cp*Mo(NO)(CH2SiMe3)(=CHSiMe3)](2)[Li-2(thf)(3)] (1). While LiN(SiMe3)(2) effects this conversion directly with no detectable intermediates, reaction with 1 equiv of LDA in THF for 15 min deprotonates the Cp* ligand to form the lithium salt of the {\textquoteright}{\textquoteright}tucked-in{\textquoteright}{\textquoteright} ate complex [(eta(5),eta(1)C(5)Me(4)CH(2))Mo(NO)(CH2SiMe3)(2)][Li(thf)(3)] (2) in 40\% isolated yield, Complex 2 slowly converts to the thermodynamically more stable 1 when left as a THF or C6D6 solution at ambient temperature fbr 48 h. Reaction of the dialkyl starting material with either tBuLi or PhLi leads to the production of the alkylidene complex 1 in irreproducible yields (10-50\% NMR; not isolable). A kinetic analysis of the reaction of [Cp*Mo(NO)(CH2SiMe3)(2)] with LiN(SiMe3)(2) indicated that the reaction was first-order in both the lithium and molybdenum reagents, and the activation parameters of Delta H-double dagger = 7,3 +/- 1.0 kcal mol(-1) and Delta S (double dagger) = -34 +/- 3 e.u. suggest an associative process. Treatment of the neutral dialkyl with 1 equiv of LiPPh2, in THF results in a one-electron reduction and production of {[Cp*Mo(NO)(CH2SiMe3)(2)][Li(thf)]}(2) (3). If left in solution, the 17e(-) dialkyl anion 3 is converted to the 18e(-) alkylidene anion 1 by the Ph2P-PPh2 coproduct, which effects the requisite hydrogen-atom abstraction. Finally, addition of a sterically undemanding alkyllithium reagent such as MeLi to the 16e(-) dialkyl reactant leads to the formation of the 18e(-) trialkyl anionic complex [Cp*Mo(NO)(CH2SiMe3)(2)(Me)][Li(thf)(3)] (4). Warming of 4 in a C6D6 solution results in loss of methane and production of 1. In most cases, the chemistry exhibited by the Mo system is duplicated by the analogous W congener, [Cp*W(NO)(CH2SiMe3)(2)]. The solid-state molecular structures of complexes 1 and 4 have been established by single-crystal X-ray crystallographic analyses.},
	keywords = {COMPLEXES, H BOND ACTIVATION, LIGAND, lithium, LIVING POLYMERIZATION, {ALKYLIDENE COMPLEXES},
	isbn = {0947-6539},
	url = {<Go to ISI>://A1997YA85600004},
	author = {Legzdins,Peter and Sayers, S. F.}
}
@article {3739,
	title = {Novel synthetic routes to the anionic alkylidene complex [Cp*Mo(NO)(CH(2)SiMe(3))(=CHSiMe(3))](-) from its neutral dialkyl precursor},
	journal = {Organometallics},
	volume = {15},
	number = {19},
	year = {1996},
	note = {ISI Document Delivery No.: VH293Times Cited: 13Cited Reference Count: 38},
	month = {Sep},
	pages = {3907-3909},
	type = {Article},
	abstract = {Conversion of the dialkyl nitrosyl complex Cp*Mo(NO)(CH(2)SiMe(3))(2) (1) to the lithium salt of the anionic alkylidene complex [Cp*Mo(NO)(CH(2)SiMe(3))(=CHSiMe(3))](2)[Li-2(THF)(3)] (2) may be effected with each of the lithium reagents LiN(SiMe(3))(2), LDA, or LiPPh(2). Interestingly, each transformation follows a different mechanistic pathway.},
	keywords = {DERIVATIVES, H BOND ACTIVATION, LIGAND, lithium, {DECOMPOSITION},
	isbn = {0276-7333},
	url = {<Go to ISI>://A1996VH29300002},
	author = {Legzdins,Peter and Sayers, S. F.}
}
@article {2951,
	title = {SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF (NEOPENTYL)(OCTAETHYLPORPHYRINATO)RUTHENIUM COMPLEXES, INCLUDING [RU(OEP)NP]2(MU-LI)2},
	journal = {Organometallics},
	volume = {13},
	number = {7},
	year = {1994},
	note = {ISI Document Delivery No.: NW037Times Cited: 21Cited Reference Count: 26},
	month = {Jul},
	pages = {2542-2544},
	type = {Note},
	abstract = {Reaction of neopentyllithium (LiNp) with the octaethylporphyrin complex Ru(OEP)Cl2 yields Ru-(OEP)Np (1), which can be treated with further LiNp to give [Ru(OEP)Np]2(mu-Li)2 (2). The structures of 1 (the first for an iron-group metalloporphyrin alkyl) and the more remarkable 2, revealing two Li atoms sandwiched between metalloporphyrin moieties, are determined.},
	keywords = {CHEMISTRY, CRYSTAL-STRUCTURE, DIMERS, lithium, OXIDATION, REACTIVITY, REDOX, TETRAVALENT RUTHENIUM PORPHYRIN},
	isbn = {0276-7333},
	url = {<Go to ISI>://A1994NW03700002},
	author = {Alexander, C. S. and Rettig, S. J. and James, Brian R.}
}
