Journal of the American Chemical Society, Vol.131, No.40, 14162-14162, 2009
Group-4 Transition-Metal Boryl Complexes: Syntheses, Structures, Boron-Metal Bonding Properties, and Application as a Polymerization Catalyst
Two group-4 boryl complexes, boryltitanium 2 and borylhafnium 3, were synthesized via nucleophilic borylation using boryllithium 1. Complexes 2 and 3 are the first examples of group-4 borylmetals. Theoretical calculations on model molecules 5 and 6 indicated that the boron-metal bond in both complexes has a covalent character. Complex 3 has activity for polymerization of ethylene or hex-1-ene.