The Codimerizations of Styrene with Vinyl Compounds Catalyzed by Olefin-palladium(II) Chloride Complexes

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概要

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• The codimerization of styrene with vinyl compounds catalyzed by di-μ-chloro-dichlorobis(styrene)dipalladium(II), (Pd(C<SUB>6</SUB>H<SUB>5</SUB>CH=CH<SUB>2</SUB>)Cl<SUB>2</SUB>)<SUB>2</SUB>, was investigated in a homogeneous system under mild conditions. The reaction of styrene and methyl acrylate carried out at 50°C for 6 hr yielded 220% codimers, 169% dimers of methyl acrylate, and 18% dimers of styrene, on the basis of the palladium(II) used. The codimerizations of styrene with vinyl acetate and with methyl vinyl ketone gave 50% codimer and 125% codimers respectively. When nitroethylene and <I>n</I>-butyl vinyl ether were used as the vinyl compound, no codimers were formed. The codimerization of styrene-d<SUB>3</SUB> with ethylene was also carried out. The reaction mechanism involving the five-coordinate hydridopalladiumolefin intermediate was proposed and discussed in the terms of the distribution of deuterium in the codimer of styrene-<I>d</I><SUB>3</SUB> and ethylene, the functional group effects of vinyl compounds, and solvent effects on the codimerization.

• 公益社団法人 日本化学会の論文

著者

• Kawamoto Keiji

  Department Of Neurosurgery Kansai Medical School

• Imanaka Toshinobu

  Department Of Chemical Engineering Faculty Of Engineering Science Osaka University

• Teranishi Shiichiro

  Department of Chemical Engineering, Faculty of Engineeing Science, Osaka University

• Tatani Atsushi

  Department of Chemical Engineering, Faculty of Engineering Science, Osaka University

• Kawamoto Keiji

  Department of Chemical Engineering, Faculty of Engineering Science, Osaka University

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