Catalytic Activities of a Polyoxime–cobalt Complex for the Addition Reaction of an Alcohol to Acrylaldehyde and for the Polymerization of Styrene

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概要

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• A new polymeric cobalt-chelate complex was prepared from cobalt acetate and a polyoxime consisting mainly of 1,2-bis(hydroxyimino)trimethylene units. The polymeric complex in the solid state at 77–300 K, both in air and under a vacuum, gives an ESR signal with a <I>g</I>-value of about 2 and can initiate the polymerization of styrene and catalyze the "Michael"-type addition reaction of an alcohol to acrylaldehyde, yielding exclusively β-alkoxypropionaldehyde, after being treated with phenylthiol and sodium borohydride. The catalytic activities depend greatly on the cobalt content and are much greater than those of its monomeric analogue in composition, bis(dimethylglyoximato)cobalt. The absorption spectrum of the polymeric complex treated with the reagents is similar to that of monomeric or polymeric analogues containing monovalent cobalt atoms.

• 公益社団法人 日本化学会の論文

著者

• Kim Sung

  Faculty In Department Of Mechanical Engineering Korea Advanced Institute Of Science And Technology

• Takizawa Takeo

  Faculty of Pharmaceutical Sciences, The University of Tokyo

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