The rates of the hydrogenation of the coordinated styrene and acrylonitrile in a rhodium-olefin complex [RhClH2(ol)(PPh3)2].

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• Kinetics of the hydrogenation of coordinated styrene and acrylonitrile in a rhodium-olefin complex RhClH<SUB>2</SUB>(ol)(PPh<SUB>3</SUB>)<SUB>2</SUB> (ol=styrene or acrylonitrile) was studied by stopped-flow method and by the direct measurements of hydrogen-gas uptake. The equilibrium constant of the reaction RhCl(ol)(PPh<SUB>3</SUB>)<SUB>2</SUB>+H<SUB>2</SUB>\rightleftharpoonsRhClH<SUB>2</SUB>(ol)(PPh<SUB>3</SUB>)<SUB>2</SUB>, <I>K</I><SUB>34</SUB>, and the rate of the hydrogenation of the olefin in the complex RhClH<SUB>2</SUB>(ol)(PPh<SUB>3</SUB>)<SUB>2</SUB>, <I>k</I><SUB>45</SUB>, were determined to be 3.2×10<SUP>3</SUP> mol<SUP>−1</SUP> dm<SUP>3</SUP> and 2.7 s<SUP>−1</SUP> for styrene, and 3.5×10<SUP>2</SUP> mol<SUP>−1</SUP> dm<SUP>3</SUP> and 0.50 s<SUP>−1</SUP> for acrylonitrile, respectively. The differences in the values for these two olefins were discussed. The data for cyclohexene were also briefly mentioned.

• 公益社団法人 日本化学会の論文

著者

• Yamagishi Akihiko

  Department Of Chemistry College Of Arts And Sciences The University Of Tokyo

• FUJIMOTO Masatoshi

  Department of Chemistry, Faculty of Science, Hokkaido University

• Ohtani Yoshimi

  Department of Chemistry, Faculty of Science, Hokkaido University

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