高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (1): 53.

• 论文 • 上一篇    下一篇

脂环酮均相催化硅氢化反应的研究

孙晶, 周秀中   

  1. 南开大学化学系, 300072
  • 收稿日期:1990-08-12 出版日期:1991-01-24 发布日期:1991-01-24
  • 通讯作者: 周秀中
  • 基金资助:

    国家自然科学基金

Studies on Homogeneous Catalytic Hydrosilation of Cycloalkanonc

Sun Jing, Zhou Xiu-zhong   

  1. Department of Chemistry, Nankai University, Tianjin, 300072
  • Received:1990-08-12 Online:1991-01-24 Published:1991-01-24

摘要: 以(Ph3P)3RhCl作催化剂.苯为介质,利用原位傅立叶红外光谱技术和假一级动力学方法,对脂环酮的均相催化硅氢化反应进行了研究,考查了脂环嗣环及环硅氢化物环的大小对反应速率的影响,结果表明其活性顺序为:模型反应I:k4>k6>k5>k7;模型反应Ⅱ:k5>k5.提出了硅基对环酮羰基的迁移插入为反应的决定速率步骤.

关键词: 硅氢化反应, 傅立叶红外光谱技术, 均相催化

Abstract: The dependence of reactivity on ring size in hydrosilation of cycloalkanone with cyclosiliconhydrides catalyzed by (Ph3P)3RhCl was studied by "in situ" FTIR technique.The results show that: 1. The rate constants of model reaction Ⅰ are arranged in decreasing order: k6>k5>k7; 2. The rate constants of model reaction Ⅱ are arranged in decreasing order: k5>k6. The migratory-insertion of silyl group to carbonyl group was proposed as the rate-determining step.

Key words: Hydrosilation, FT-IR technique, Homogeneous catalysis

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