Patent ID: 8598288

Claim:
A catalyst for a polymerization of norbornene monomers, the catalyst comprising: a transition metal complex represented by a formula (1); a cocatalyst to generate a cationic transition metal compound by reacting with the transition metal complex, the cocatalyst being an ionic compound; and a phosphine ligand, wherein M represents one transition metal belonging to Group 8, Group 9 or Group 10 of the Periodic Table of the Elements issued in 1991, each of R 1 , R 2 , R 3 and R 4 independently represents a hydrogen atom, a substituted or unsubstituted hydrocarbon group having 1 to 20 carbon atoms, a halogen atom, an alkoxy group, an aryloxy group, a silyl group having 1 to 20 carbon atoms, a siloxy group containing a hydrocarbon group having 1 to 20 carbon atoms, a nitro group, a cyano group, an amide group containing a hydrocarbon group having 1 to 10 carbon atoms or a dialkylamino group containing an alkyl group having 1 to 10 carbon atoms, or each of R 1 , R 2 , R 3 and R 4 independently represents a hydrogen atom, a substituted or unsubstituted hydrocarbon group having 1 to 20 carbon atoms, a halogen atom, an alkoxy group, an aryloxy group, a silyl group having 1 to 20 carbon atoms, a siloxy group containing a hydrocarbon group having 1 to 20 carbon atoms, a nitro group, a cyano group, an amide group containing a hydrocarbon group having 1 to 10 carbon atoms or dialkylamino group containing an alkyl group having 1 to 10 carbon atoms, and at least two of R 1 , R 2 , R 3 and R 4 bond to each other to form a ring structure, R 5 represents a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms, R 6 represents a hydrocarbon group having 1 to 20 carbon atoms, and each of R 7 , R 8 , R 9 , R 10 and R 11 independently represents a hydrogen atom, a halogen atom or a hydrocarbon group having 1 to 20 carbon atoms, or each of R 7 , R 8 , R 9 , R 10 and R 11 independently represents a hydrogen atom, a halogen atom or a hydrocarbon group having 1 to 20 carbon atoms, and at least two of R 7 , R 8 , R 9 , R 10 and R 11 bond to each other to form a ring structure.