@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 = {://000171061200016}, author = {Fryzuk,Michael D. and Yu, P. H. and Patrick, B. O.} } @article {7013, title = {PHOSPHINE COMPLEXES OF THE EARLY METALS AND THE IANTHANOIDS}, journal = {Pure and Applied Chemistry}, volume = {63}, number = {6}, year = {1991}, note = {ISI Document Delivery No.: FN255Times Cited: 21Cited Reference Count: 2314TH INTERNATIONAL CONF ON ORGANOMETALLIC CHEMISTRYAUG 19-24, 1990DETROIT, MIINT UNION PURE \& APPL CHEM, DIV INORGAN CHEM, WAYNE STATE UNIV}, month = {Jun}, pages = {845-850}, type = {Proceedings Paper}, abstract = {The coordination chemistry of the mixed-donor tridentate ligand -N(SiMe2CH2PR2)2 with the early transition metals of groups 3 and 4 and the lanthanide elements will be presented. This ancillary ligand has allowed for the formation of phosphine complexes of these hard elements which has in turn induced new reactivity patterns for hydrocarbyl ligands.}, keywords = {DERIVATIVES, F-BLOCK METALS, FLUXIONAL BEHAVIOR, GROUP-4, HAFNIUM(IV), LIGANDS, RAY CRYSTAL-STRUCTURE, ZIRCONIUM(IV)}, isbn = {0033-4545}, url = {://A1991FN25500008}, author = {Fryzuk,Michael D. and Haddad, T. S. and Berg, D. J. 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 = {://A1991FQ93300059}, author = {Fryzuk,Michael D. and Haddad, T. S. and Rettig, S. J.} }