Patent ID: 6486277
Filing Date: 2002-11-26
Classification: C07F,C08F,Y10S

Abstract:
A zwitterionic transition metal compound of the formula I whereM1 is titanium, zirconium of hafnium, n is 2 or 3, L is a substituted cyclopentadienyl ring or a substituted indenyl ring, it also being possible for two or more substituents of the indenyl ring together to form a ring system and for the cyclopentadienyl and indenyl rings to be unbridged or bridged by Z, with Z bridging groups of the formula M2R2R3, where M2 is carbon, silicon, germanium or tin and R2 and R3 are identical or different C1-C10-alkyl, C6-C14-aryl or trimethylsilyl, X is an aromatic or nonaromatic heterocyclic structure, Y is a C1-C40-hydrocarbon radical which may be halogenated with halogens, f is 1, A is boron, R1 are identical or different and are each a perfluorinated C1-C40-alkyl or aryl group, and m is 2.