title: Synthesis, structural characterization, catalytic properties, and theoretical study of compounds containing an Al-O-M (M = Ti, Hf) core.
abstract: Two single oxygen-bridged heterobimetallic oxides of Al(III) with group 4 metals (Ti, Hf) have been prepared. The reaction of LAlMeOH (1) [L = CH(N(Ar)(CMe))2, Ar = 2,6-iPr2C6H3] with dimethylmetallocenes of Ti and Hf in toluene (80 degrees C) and ether (room temperature), respectively, resulted in the formation of LAl(Me)(mu-O)M(Me)Cp2 [M = Ti (2), Hf (3)] in moderate to good yield. Compounds 2 and 3 were characterized by elemental analysis, IR, NMR (1H and 13C), EI-MS, and single-crystal X-ray structural analysis. Furthermore, compound 2 showed good catalytic activity in ethylene and styrene homopolymerization, while compound 3 is less active in ethylene polymerization. The styrene polymerization yields atactic polystyrene.
authors.affiliation: Institut für Anorganische Chemie der Georg-August-Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany.
authors.forename: Prabhuodeyara M
authors.initials: PM
authors.lastname: Gurubasavaraj
authors.forename: Swadhin K
authors.initials: SK
authors.lastname: Mandal
authors.forename: Herbert W
authors.initials: HW
authors.lastname: Roesky
authors.forename: Rainer B
authors.initials: RB
authors.lastname: Oswald
authors.forename: Aritra
authors.initials: A
authors.lastname: Pal
authors.forename: Mathias
authors.initials: M
authors.lastname: Noltemeyer