Patent ID: 7279537

Claim:
A transition metal complex of formula (2): wherein M represents Cr, Y represents a substituted or unsubstituted C1-10 alkyl group, a substituted or unsubstituted C7-20 aralkyl group, a substituted or unsubstituted C6-20 aryl group, a silyl group substituted with substituted or unsubstituted C1-20 hydrocarbon, R 1 , R 2 , K 3 , R 4 , R 5 , R 6 , R 7 and R 8 are the same or different and represent a hydrogen atom, a halogen atom, an C1-10 alkyl group, an C1-10 alkoxyl group, or a silyl group substituted with C1-20 hydrocarbon, X 1 and X 2 are the same or different, and represent a hydrogen atom, a halogen atom, a substituted or unsubstituted C1-10 alkyl group, a substituted or unsubstituted C7-20 aralkyl group, a substituted or unsubstituted C6-20 aryl group, a substituted or unsubstituted C1-10 alkoxy group, a substituted or unsubstituted C7-20 aralkyloxy group, a substituted or unsubstituted C6-20 aryloxy group, or an amino group disubstituted C1-20 hydrocarbon, and n 1 is an integer of 0 to 3.