高等学校化学学报

高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (8): 1026.

• 论文 • 上一篇    下一篇

辅酶B12模型化合物的研究(V)RCo(Salen)L配合物Co—C键断裂的动力学

陈慧兰, 王志林, 崔世平, 陈冠菁, 唐雯霞   

  1. 南京大学化学系、配位化学研究所, 南京, 210008
  • 收稿日期:1991-09-26 出版日期:1992-08-24 发布日期:1992-08-24
  • 通讯作者: 陈慧兰
  • 基金资助:

    国家自然科学基金

Studies on Coenzyme B12 Model Complexes(Ⅴ)——Kinetics of Co-C Bond Cleavage of RCo(SaIen)L Complexes

CHEN Hui-Lan, WANG Zhi-Lin, GUI Shi-Ping, CHEN Guan-Qing, TANG Wen-Xia   

  1. Department of Chemistry, Institute of Coordination Chemistry, Nan jing University, Nanjing, 210008
  • Received:1991-09-26 Online:1992-08-24 Published:1992-08-24

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摘要： 运用光度法研究了RCo(Salen)L配合物在甲醇中热分解反应动力学;测定了Co—C键断裂的速率常数及活化能,得到表观速率常数顺序为i-C3H7>i-C4H9>n-C4H9>n-C3H7>C2H5,活化能顺序为i-C3H7<n-C4H9<i-C4H9≈n-C3H7<C2H5,讨论了影响速率常数和温度的因素。

关键词: 辅酶B12, 烷基钴Schiff碱, 热分解, 动力学

Abstract: The kinetics of thermolysis of RCo(Salen)Lcomplexes in methanol was studied by using UV-Vis spectrophotometry.The observable rate constants and the energy of activation were determined.The sequence of the rate constants is i-C3H7>i-C4H3>n-C4H9>n-C3H7>C2H5 and of the energy of activation is i-C3H7<n-C4H9<i-C4H9<n-C3H7<C2H5 The effects on thermolysis were discussed.

Key words: Coenzyme B12, Alkylcobalt schif f base, Thermolysis, Kinetics

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