Metallocenes having benzo-fused indenyl derivatives as ligands, processes for their preparation and their use as catalysts

Claim 1

A compound of the formula I ##STR13## in which M 1 is a metal of group IVb, Vb or VIb of the periodic table, R 1 and R 2 are identical or different and are a hydrogen atom, a C 1 -C 10 -alkyl group, a C 1 -C 10 -alkoxy group, a C 6 -C 10 -aryl group, a C 6 -C 10 -aryloxy group, a C 2 -C 10 -alkenyl group, a C 7 -C 40 - arylalkyl group, a C 7 -C 40 -alkylaryl group, a C 6 -C 40 -arylalkenyl group, an OH group or a halogen atom, the radicals R 3 are identical or different and are a hydrogen atom, a halogen atom, a C 1 -C 10 -alkyl group, which can be halogenated, a C 6 -C 10 -aryl group or an --NR 2 , --SR, --OSiR 3 , --SiR 3 or --PR 2 radical, in which R is a halogen atom, a C 1 -C 10 -alkyl group or a C 6 -C 10 -aryl group, R 4 to R 10 have the meaning given for R 3 , or adjacent radicals R 4 to R 10 with the atoms joining them, form an aromatic or aliphatic ring, and ##STR14## in which R 12 and R 13 are identical or different and are a hydrogen atom, a halogen atom, a C 1 -C 10 -alkyl group, a C 1 -C 10 -fluoroalkyl group, a C 6 -C 10 -aryl group, a C 6 -C 10 -fluoroaryl group, a C 1 -C 10 -alkoxy group, a C 2 -C 10 -alkenyl group, a C 7 -C 40 -arylalkyl group, a C 8 -C 40 -arylalkenyl group or a C 7 -C 40 -alkylaryl group, or R 12 and R 13 , in each case with the atoms joining them, form a ring, and M 2 is silicon, germanium or tin.