English Abstract

New Synthesis of Diene Polymers Promoted by Late Transition Metal Catalysts Daisuke TAKEUCHI Kohtaro OSAKADA Tokyo Institute of Technology, Japan Chemical Resources Laboratory R1-03, Midori-ku, Yokohama, Japan Nippon Gomu Kyokaishi,(2008),81(10),419-423 General Review in Japanese Abstract This article reviews recent papers on polymerization of dienes and methylenecyclopropanes promoted by late transition metal complexes. Pd-diimine complexes catalyze cyclopolymerization of functionalized 1,6-heptadienes to produce the polymers having five-membered rings in the repeating units, while Fe- and Co-complex catalyzes the polymerization of unsubstituted 1,6-heptadiene. 1,6-Octadiene derivative and higher diene monomers also polymerize in the presence of Pd catalyst. Details of the reactions are discussed. Addition polymerization of methylenecyclopropanes by Ni catalyst affords the polymers with unique structures. Keywords: Non-conjugated Diene, Polymerization Catalyst, Iron, Palladium, Cobalt.

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