Chelate-Ring Formation in Cr (Co)_5(phen) Studied by Laser Frash Photolysis with Visible and Infrared Detection

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著者

    • OISHI Shigero
    • Department of Chemistry, School of Science, Kitasato University
    • INUI Hiroshi
    • Department of Chemistry, School of Science, Kitasato University

抄録

Kinetic parameters were obtained for the formation of chelate ring in transient Cr(CO)<SUB>5</SUB>(phen) and 0.17 s<SUP>−1</SUP> (20 °C), ΔH<SUP>‡</SUP> = 85.0 kJ·mol<SUP>−1</SUP>, and ΔS<SUP>‡</SUP> =29.8 J·mol<SUP>−1</SUP>·K<SUP>−1</SUP>, indicating the concerted extrusion of CO by an uncoordinated nitrogen rather than the simple dissociation of CO. In comparison with other bidentate ligands, it was revealed that the structural advantage of phen, which gave significant enhancement in the rate of chelation, was due to entropy term.

収録刊行物

  • Chemistry letters

    Chemistry letters 1997(2), 115-116, 1997-02

    The Chemical Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002609515
  • NII書誌ID(NCID)
    AA00603318
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    03667022
  • データ提供元
    CJP書誌  J-STAGE 
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