Patent ID: 7754835

Claim:
An active catalyst system comprising: a) a metallic complex of formula III wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 are each independently selected from hydrogen, unsubstituted or substituted hydrocarbyl having from 1 to 20 carbon atoms, or inert functional group and wherein two or more of those groups can themselves be linked together to form further ring or rings, wherein M is a metal Group 3 to 9 of the Periodic Table, wherein each X is the same or different and is selected from halogen, substituted or unsubstituted hydrocarbyl having from 1 to 20 carbon atoms, substituted or unsubstituted aryloxy or alkoxy, and wherein (n+1) is the valence of M; b) an activating agent; and c) an optional cocatalyst.