Patent ID: 8153545

Claim:
A metal complex catalyst, which is a reaction product of: A) at least one metal complex represented by Formula I: wherein: M I is lanthanum, cerium, praseodymium, neodymium, or promethium; M II is lithium, sodium, or potassium; N is nitrogen; X, independently in each occurrence, is fluoride, chloride, bromide or iodide, or an —OR group, wherein R, independently in each occurrence, is hydrogen, or a group having from 1 to 80 atoms, not counting hydrogen, selected from hydrocarbyl, hydrocarbylsilyl, halo-substituted hydrocarbyl, hydrocarbyloxy-substituted hydrocarbyl, acyl-substituted hydrocarbyl, arylcarbonyl-substituted hydrocarbyl, hydrocarbylamino-substituted hydrocarbyl, hydrocarbylsilyl-substituted hydrocarbyl, acyl, or arylcarbonyl; D is THF, DME, TEA, TMEDA, Et 2 O; s is the number 0 or 1; y is the number 1, 2, 3, 4, 5, or 6; o is the number 1; p is the number 1; t is the number 0, 1, 2 or 3; R A and R B , independently in each occurrence are hydrogen, a halide atom or a group having from 1 to 80 atoms not counting hydrogen, selected from the group consisting of hydrocarbyl, hydrocarbylsilyl, halo-substituted hydrocarbyl, hydrocarbyloxy-substituted hydrocarbyl, hydrocarbylamino-substituted hydrocarbyl, or hydrocarbylsilyl-substituted hydrocarbyl; wherein the two ligands (R A )(R B )N are only linked via M I ; and B) at least one activator selected from: a) C 1-30 organoboron or organoaluminum compounds, b) polymeric or oligomeric alumoxanes, c) non-polymeric compatible, non-coordinating, ion-forming compounds, and d) hydrocarbyl sodium, hydrocarbyllithium, hydrocarbyl zinc, hydrocarbyl magnesium halide, and dihydrocarbyl magnesium; and wherein A) and B) are brought together in a reaction medium at a temperature from −78° C. to 250° C.