Recent Development of Late Transition Metal Catalysts for Polymerization of Substituted Acetylenes

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  • 後周期遷移金属触媒を用いた置換アセチレン重合の新展開
  • コウシュウキ センイ キンゾク ショクバイ オ モチイタ チカン アセチレン ジュウゴウ ノ シン テンカイ

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This article overviews the new aspects of transition metal catalysts for polymerization of substituted acetylene monomers. The activity of rhodium-based catalysts is enhanced by introducing a strongly π-acidic diene ligand, tetrafluorobenzobarrelene (tfb). Precise control of polymerization of phenylacetylenes is achieved by two types of rhodium catalysts bearing tfb. The activity of zwitterionic rhodium-type catalyst is also intensified by the introduction of tfb, which achieves a higher monomer consumption rate than that with the conventional rhodium catalyst. Disubstituted acetylenes with polar functional groups are polymerized by well-defined ruthenium carbene catalyst. Phenylacetylenes having a coordinative substituent at the ortho position on its aromatic ring are efficiently polymerized by the ruthenium carbene catalyst to give the corresponding polymers in high yields.

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