高等学校化学学报

高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (1): 133.

• 研究简报 • 上一篇    下一篇

[Fe(CN)6]4-还原高位阻[Co(tmen)3]3+的反应

颜文斌, 周朝晖, 章慧, 唐星原, 徐志固   

  1. 厦门大学化学系, 厦门 361005
  • 收稿日期:1994-02-19 修回日期:1994-05-29 出版日期:1995-01-24 发布日期:1995-01-24
  • 通讯作者: 颜文斌,男,29岁,讲师,现在湖南吉首大学化学系.
  • 作者简介:周朝晖
  • 基金资助:

    国家自然科学基金

Kinetic Investigation of the Ruduction for Crowded[Co(tmen)3]3+by[Fe(CN)6]4-

YAN Wen-Bin, ZHOU Zhao-Hui, ZHANG Hui, TANG Xing-Yuan, XU Zhi-Gu   

  1. Department of Chemistry、Xiamen University, Xiamen, 361005
  • Received:1994-02-19 Revised:1994-05-29 Online:1995-01-24 Published:1995-01-24

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关键词: 电子转移反应, 外配位界机理, 三氯三(四甲基乙二胺)合钴(Ⅲ)

Abstract: Kinetic studies of the outer-sphere electron transfer reaction between[Co(tmen)3]3+and[Fe(CN)6]4-have been carried out at various temperatures and pHvalues. The ion-pair formation constant Qip of the precursor complex[Co(tmen )3]3+[Fe(CN)6]4- is 5.6×102L·mol-1, and the rate constant ket for the electron transfer within the ion-pair is 6.8×10-3s-1at 25℃ and I=0.10 mol/L. The activation enthalpy △Het≠and the activation entropy △Het≠of this reaction are 1.6×102kJ/mol and 6.5×102J/mol·K respectively. The mechanism of the reaction is discussed.

Key words: Electron transfer reaction, Outer-sphere mechanism, Trichlorotritetramethylethylenediamine cobalt(Ⅲ)

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