Patent ID: 8207281

Claim:
A transition metal compound of the formula (I): wherein M is a Group 4 metal, R 3 , R 4 , R 9 , and R 10 are identical or different, being selected from hydrogen, C 1 -C 20 -alkyl, 3- to 8-membered cycloalkyl which may in turn bear a C 1 -C 10 -alkyl group as substituent, C 6 -C 15 -aryl, alkylaryl having from 1 to 10 carbon atoms in the alkyl part and from 6 to 20 carbon atoms in the aryl part, aryialkyl having from 1 to 10 carbon atoms in the alkyl part and from 6 to 20 carbon atoms in the aryl part, G 1 (R 13 R 14 ) and G 2 (R 13 ), wherein at least one of R 3 and R 4 is selected from G 1 (R 13 R 14 ), G 1 is N or P and R 1 , R 2 , R 5 , R 6 , R 7 , R 5 , R 11 , R 12 are identical or different and are each hydrogen, C 1 -C 20 -alkyl, 3- to 8-membered cycloalkyl which may in turn bear a C 1 -C 10 -alkyl group as substituent, C 6 -C 15 -aryl, alkylaryl having from 1 to 10 carbon atoms in the alkyl part and from 6 to 20 carbon atoms in the aryl part, arylalkyl having from 1 to 10 carbon atoms in the alkyl part and from 6 to 20 carbon atoms in the aryl part, wherein R 4 and R 5 together with the carbon atoms connecting them may also form a saturated or unsaturated ring system having from 4 to 15 carbon atoms, and wherein R 10 and R 11 together with the carbon atoms connecting them may also form a saturated or unsaturated ring system having from 4 to 15 carbon atoms, R 13 is a C 1 -C 20 -alkyl, and R 14 is a C 6 -C 15 -aryl, alkylaryl having from 1 to 10 carbon atoms in the alkyl part and from 6 to 20 carbon atoms in the aryl part, arylakyl having from 1 to 10 carbon atoms in the alkyl part and from 6 to 20 carbon atoms in the aryl part, X is halogen, a C 1 -C 20 -alkyl or a C 6 -C 15 -aryl, A represents two substituents as defined for R 1 or is a bridge selected from ═BR 17 , ═AlR 17 , —Ge—, —Sn—, —O—, —S—, ═SO, ═SO 2 , ═NR 17 , ═CO, ═PR 17 or ═P(O)R 17 , wherein R 17 are identical or different and are each hydrogen, halogen, C 1 -C 10 -alkyl, C 1 -C 10 -fluoroalkyl, C 6 -C 10 -fluoroaryl, C 6 -C 10 -aryl, C 1 -C 10 -alkoxy, C 2 -C 10 -alkenyl, C 7 -C 40 -arylalkyl, C 8 -C 40 -arylalkenyl, C 7 -C 40 -alkylaryl or two radicals R 17 together with the atoms connecting them form a ring, n is an integer from 2 to 6 and M 1 is silicon, germanium or tin.