title: Lutetium alkyl and hydride complexes in a non-cyclopentadienyl coordination environment.
abstract: Lutetium alkyl complexes [Lu(L)(CH(2)SiMe(3))(THF)(n)], which contain a sulfur-linked bis(phenolato) ligand such as 2,2'-thiobis(6-tert-butyl-4-methylphenolate) (L=tbmp, 1) or 1,4-dithiabutanediyl-bis(6-tert-butyl-4-methylphenolate) (L=etbmp, 2), were isolated from the reaction of the lutetium tris(alkyl) complex [Lu(CH(2)SiMe(3))(3)(THF)(2)] with H(2)L. The monomeric structures of these complexes were confirmed by X-ray diffraction studies, showing distorted octahedral geometry around the metal centre. The reaction of [Lu(tbmp)(CH(2)SiMe(3))(THF)(2)] (1) with alcohols ROH (R=iPr, CHPh(2), CPh(3)) results in the formation of the corresponding alkoxide complexes [Lu(tbmp)(OR)(THF)(n)] (4-6). With PhSiH(3) hydride complexes [Lu(L)(mu-H)(THF)(n)](2) (L=tbmp, 7; etbmp, 8) have been prepared in moderate to good yields. They adopt a dimeric form in the solid state as revealed by the X-ray crystal structure of 7. The reactivity of the hydride complexes and their catalytic activity in the ring-opening polymerisation of L-lactide and the hydrosilylation of alkenes are also discussed.
authors.affiliation: Institute for Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany.
authors.forename: Marcin
authors.initials: M
authors.lastname: Konkol
authors.forename: Thomas P
authors.initials: TP
authors.lastname: Spaniol
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Kondracka
authors.forename: Jun
authors.initials: J
authors.lastname: Okuda
mesh_terms: D018360:Crystallography, X-Ray / Q000379:methods; D006859:Hydrogen / Q000737:chemistry; D008024:Ligands; D008187:Lutetium / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008956:Models, Chemical; D008968:Molecular Conformation; D015394:Molecular Structure