Patent ID: 7405261

Claim:
An organometallic transition metal compound of the formula (I) where M 1 is an element of group 3, 4, 5 or 6 of the Periodic Table of the Elements or the lanthanides, X are identical or different and are each halogen, hydrogen, C 1 -C 20 -alkyl, C 2 -C 20 -alkenyl, C 6 -C 22 -aryl, alkylaryl or arylalkyl each having from 1 to 10 carbon atoms in the alkyl part and from 6 to 22 carbon atoms in the aryl part, —OR 6 or —NR 6 R 7 , where two radicals X may also be joined to one another, n is a natural number from 1 to 4 which corresponds to the oxidation number of M 1 minus 2, R 1 is hydrogen or a cyclic, branched or unbranched C 1 -C 20 -alkyl radical; a C 2 -C 20 -alkenyl radical, an arylalkyl radical having from 1 to 10 carbon atoms in the alkyl part and from 6 to 22 carbon atoms in the aryl part or a C 4 -C 24 heteroaromatic radical selected from the group consisting of substituted or unsubstituted thienyl radicals or of substituted or unsubstituted furyl radicals, R 2 is a substituted or unsubstituted C 6 -C 40 -aryl radical, R 3 is hydrogen or a cyclic, branched or unbranched C 1 -C 20 -alkyl radical, C 2 -C 20 -alkenyl radical, an arylalkyl radical having from 1 to 10 carbon atoms in the alkyl part and from 6 to 22 carbon atoms in the aryl part, or the radicals R 2 and R 3 together form a ring system, R 4 is hydrogen or a cyclic, branched or unbranched C 1 -C 20 -alkyl radical, a C 2 -C 20 -alkenyl radical, an arylalkyl radical having from 1 to 10 carbon atoms in the alkyl part and from 6 to 22 carbon atoms in the aryl part, R 5 is a cyclic, branched or unbranched C 1 -C 20 -alkyl radical, a C 2 -C 20 -alkenyl radical, an arylalkyl radical having from 1 to 10 carbon atoms in the alkyl part and from 6 to 22 carbon atoms in the aryl part, and Z is a divalent group CR 8 R 9 —CR 10 R 11 , where R 8 , R 9 , R 10 , and R 11 are identical or different and are each hydrogen or a trimethylsilyl group, a C 1 -C 10 -alkyl group, a C 1 -C 10 -fluoroalkyl group, a C 6 -C 10 -fluoroaryl group, a C 6 -C 10 -aryl group, a C 8 -C 40 -arylalkenyl group, a C 7 -C 40 -arylalkyl group or a C 7 -C 40 -alkylaryl group or two adjacent radicals together with the atoms connecting them may form a saturated or unsaturated ring having from 4 to 15 carbon atoms.