Patent ID: 7049453

Claim:
A compound of the formulae Ia and Ib, where M 1 is a metal of groups III to X of the Periodic Table of the Elements, the radicals D 1 are identical or different and are each a donor atom of group XV of the Periodic Table of the Elements, and the radicals D 2 are identical or different and are each a donor atom of group XV of the Periodic Table of the Elements, and Z is a bridging structural element between the donor atom D 1 and the pentacoordinating cyclic system and the radicals X are identical or different and are each a hydrogen atom, a C1–C 20 -hydrocarbon group or a halogen atom or OR 3 , SR 3 , OSO 2 R 3 , OSi(R 3 ) 3 , Si(R 3 ) 3 , P(R 3 ) 2 , P(R 3 ) 3 , NCR 3 , N(R 3 ) 3 , B(R 3 ) 4 , substituted or unsubstituted pyridine or N(R 3 ) 2 , and the radicals R 1 are identical or different and are each a hydrogen atom, a C 1 –C 20 -alkyl group, a C 6 –C 20 -aryl group, a C 7 –C 20 -alkylaryl group, a C7-C 10 -arylalkyl group, a C 2 –C 20 -alkenyl group, a C 2 –C 20 -alkynyl group or a halogen-containing C 1 –C 20 -alkyl group, C 6 –C 20 -aryl group, C 7 –C 30 -alkylaryl group, C 7 –C 30 -arylalkyl group, C 2 –C 20 -alkenyl group, C 2 –C 20 -alkynyl group or a heteroatom-containing C 1 –C 20 -alkyl group, C 6 –C 20 -aryl group, C 7 –C 20 -alkylaryl group, C 7 –C 30 -arylalkyl group, C 2 –C 20 -alkenyl group, C 2 –C 20 -alkynyl group or Si(R 3 ) 3 , where one or more radicals R 1 together with one or more radicals R 1 may form a monocyclic or polycyclic ring system, and the radicals R 2 are identical or different and are each a hydrogen atom, Si(R 3 ) 3 , a C 1 –C 30 group which together with the cyclopentadienyl ring may form an azapentalene, diiapentalenc or thiapentalene or phosphapentalene, or two or more radicals R 2 may be joined to one another so that the radicals R 2 and the atoms of the cyclopentadienyl ring which connect than form a C 4 –C 24 ring system which may in turn be substituted by R 3 , the radicals R 3 are identical or different and are each a hydrogen atom, a halogen atom, a C 1 –C 10 -alkyl group, a C 6 –C 20 -aryl group, a C 7 –C 20 -alkylaryl group, a C 7 –C 30 -arylalkyl group, a C 2 –C 20 -alkenyl group, a C 2 –C 20 -alkynyl group or a halogen-containing C 1 –C 20 -alkyl group, C 6 –C 20 -aryl group, C 7 –C 20 -alkylaryl group, C 7 –C 30 -arylalkyl group, C 2 –C 20 -alkenyl group, C 2 –C 20 -alkynyl group or a heteroatom-containing C 1 –C 20 -alkyl group, C 6 –C 20 -aryl group, C 7 –C 20 -alkylaryl group, C 7 –C 30 -arylalkyl group, C 2 –C 20 -alkenyl group, C 2 –C 20 -alkynyl group, and a is an integer from 0 to 10, and when a=0, D 1 forms a covalent bond to the pentacoordinating cyclic system, and the indices b are identical or different and are each an integer from 1 to 10, and the indices c are identical or different and are each an integer from 1 to 10, and d is an integer from 1 to 10, and g is an integer from 1 to 3, and h is an integer from 1 to 4, and m is 4.