Patent ID: 8618229

Claim:
A compound having the formula: wherein: M 1 is a transition metal; each R 1A and R 1B independently is a C 1 to C 18 hydrocarbyl or hydrocarbylsilyl group, wherein p and q independently are 1, 2, 3, or 4; D is O; NR 1C , wherein R 1C is hydrogen or a C 1 to C 18 alkyl group; PR 1D , wherein R 1D is hydrogen or a C 1 to C 18 alkyl group; or one of the following heterocyclic groups: each X 0 independently is a neutral ligand, wherein a is 0, 1, or 2; each X 1 independently is a monoanionic ligand, wherein b is 0, 1, 2, 3, or 4; X 2 is a dianionic ligand, wherein c is 0 or 1; and an oxidation state of M 1 is equal to (b+2c+2).