Patent ID: 7259214

Claim:
A method for producing a polyolefin, comprising: polymerizing or co-polymerizing an olefin in the presence of a catalyst, the catalyst comprising any combination of two neutral metal compounds, the combination having the general formula II, III, or IV: wherein: M is Ni, Pt, Pd; A is a π-allyl, a substituted π-allyl, a π-benzyl or a substituted π-benzyl; X is N or P; Y is O, CH 2 , or S; L is N or a structure that is capable of forming a neutral two electron donor ligand; L 1 is a neutral monodentate ligand capable of being displaced by said olefin and L 2 is a monoanionic monodentate ligand, or L 1 and L 2 taken together are a monoanionic bidentate ligand, provided that said monoanionic monodentate ligand or said monoanionic bidentate ligand is capable of adding to said olefin; B is a bridge connecting covalently an unsaturated carbon and L; R 1 , R 2 , and R 3 are the same or different and are each independently hydrogen, hydrocarbyl group, or substituted hydrocarbyl bearing functional group.