高等学校化学学报

高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (4): 548.

• 研究论文 • 上一篇    下一篇

(p-CH3OC6H4)2TeO存在下M2(CO)10(M=Mn,Re)的CO取代反应动力学研究

高忆慈, 申建坤, 史启祯   

  1. 兰州大学化学系, 兰州 730000
  • 收稿日期:1992-07-07 修回日期:1992-10-28 出版日期:1993-04-24 发布日期:1993-04-24
  • 通讯作者: 高忆慈
  • 基金资助:

    国家自然科学基金

Kinetics of CO Substitution of M2(CO)10(M=Mn,Re) with Py in the Presence of (p-CH2OC2H4)2TeO

GAO Yi-Ci, SHEN Jian-Kun, SHI Qi-Zhen   

  1. Department of Chemistry, Lanzhou University, Lanzhou, 730000
  • Received:1992-07-07 Revised:1992-10-28 Online:1993-04-24 Published:1993-04-24

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摘要： 测定了(p-CH3OC6H4)2TeO存在下M2(CO)10(M=Mn,Re)的CO取代反应速率及活化参数。其表观速率常数分别与M2(CO)10和(p-CH3OC6H4)2TeO的浓度的一次方成正比。本文所建议的缔合机理与前人用(CH3)3NO作氧原子转移试剂的相应反应所提出的机理相似。讨论了在(CH3)3NO和(p-CH3OC6H4)2TeO存在下影响M2(CO)10的CO取代反应速率的因素。

关键词: Mn2(CO)10, Re2(CO)10, 氧原子转移反应, 动力学

Abstract: Reported are the rates of reaction and activation parameters for COsubstitution reaction of M2(CO)10(M=Mn,Re) with Py in the presence of (p-CH3OCeH4)2TeO.The rate of reaction is the first order in concentrations of M2(CO)10 and of (p-CH3OC6H4)2TeO, but zero order in Py.One possible mechanism.is suggested for the reaction, which is similar to that proposed earlier for the corresponding reactions with (CH3)3NO as the O-atom transfer reagent.The difference of activities between (CH3)3NOand (p-CH3OC6H4)2TeO is discussed in terms of their basicity in this paper.

Key words: Mn2(CO)10, Re2(CO)10, O-atom transfer reaction, Kinetic

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