Patent ID: RE40121

Claim:
A zwitterionic transition metal compound of the formula I where L are identical or different and are each a π-ligand or an electron donor, n is equal to 1, 2, 3 or 4, M is a metal atom of group IIIb, IVb, Vb or VIb of the Periodic Table of the Elements, X is a heteroatom or a hydrocarbon group having 1-40 carbon atoms, X′ is a hydrocarbon group having 1-40 carbon atoms, A is an atom of group Ib, IIb, IIIa, IIIb, IVa, Va, Vb, VIb, VIIb or VIIIb of the Periodic Table of the Elements, R 1 are identical or different and are each a perhalogenated C 1 -C 40 -hydrocarbon radical, and m is equal to 1, 2, 3, 4 or 5.