| abstract |
The present invention relates to a norbornene-based polymerization catalyst containing a transition metal complex (A) represented by the general formula (1), and a norbornene-based polymer that homopolymerizes or copolymerizes a norbornene-based monomer in the presence of the polymerization catalyst. A polymer, in particular, a method for producing a norbornene-based copolymer having a monomer unit represented by formulas (2) and (3). As the transition metal complex (A), (π-allyl) {4- (2,6-diisopropylphenylimino) -2-pentene-2-oleito-κ 2 N, O} palladium, (π-allyl) Preference is given to {4- (1-naphthylimino) -2-pentene-2-oleito-κ 2 N, O} palladium (symbols in the formula are as described in the specification). According to the present invention, norbornene-based (co) polymers excellent in transparency, heat resistance, low water absorption and electrical insulation properties can be efficiently produced. |