| abstract |
(57) [Problem] To provide a catalyst used for polymerization of an olefin comprising a novel transition metal compound having trispyrazolyl borate as a ligand, and a method for polymerizing an olefin using the catalyst. SOLUTION: A catalyst comprising (A) a transition metal compound having trispirazolyl borate as a ligand, and (B) a cocatalyst selected from the group consisting of an organoaluminum oxy compound, a Lewis acid compound and an ionic compound; A polymerization method using this. |