Patent ID: 6939928

Claim:
A metallocene compound represented by the following formula (1b) or (2b): wherein R 21 and R 22 may be the same or different and are each selected from a hydrocarbon group or a silicon-containing hydrocarbon group; R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 and R 14 may be the same or different and are each selected from a hydrogen atom, a hydrocarbon group or a silicon-containing hydrocarbon group; of the groups indicated by R 5 to R 12 , neighboring groups may be bonded to form a ring; and when R 22 is tert-butyl and R 13 and R 14 are methyl, R 6 , R 7 , R 10 and R 11 are not all hydrogen; when all of R 5 to R 12 are hydrogen, R 22 is a hydrocarbon other than phenyl, and when R 7 and R 10 are both tert-butyl and R 5 , R 6 , R 8 , R 9 , R 11 and R 12 are all hydrogen, R 22 is not methyl, tert-butyl or trimethylsilyl; A is a divalent hydrocarbon group of 2 to 20 carbon atoms which may contain an unsaturated bond and/or an aromatic ring; A may contain two or more cyclic structures including a ring formed by A in cooperation with Y; M is a metal selected from Group 4 of the periodic table; Y is a carbon atom or a silicon atom; j is an integer of 1 to 4; Q is selected from the group consisting of a halogen atom, a hydrocarbon group, an anionic ligand and a neutral ligand capable of coordination by a lone pair; and when j is 2 or greater, each Q may be the same or different.