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咪唑钴(Ⅲ)配合物还原动力学机理研究

Kinetic Investigation on the Mechanism of the Reduction of Imidazole Cobalt(Ⅲ) Complexes

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【作者】 章慧颜文斌周朝晖徐志固

【Author】 Zhang Hui; Yan Wenbin ;Zhou Zhaohui ;Xu Zhigu(Department of Chemistry, Ziamen University, Xiamen 361005)

【机构】 厦门大学化学系!厦门361005湖南吉首大学化学系

【Abstract】 Kinetic studies on the electron transfer(ET) reaction of [Co(NH3)5(ImH)]3+/[Fe(CN)6]4- and trans-[Co(NH3)(en)2(ImH)]3+/[Fe(CN)6]4- have been carried out at various temperatures. The results indicated that these two ET reactions followed the outersphere mechanism. At 25℃,I=0.50mol’L-1, the ion pair formation constants Qip ofthe prectirsor complexes in the ET reactions are 2.6×102 and 4.9 × 1O2mol’L-1 ,and theelectron transfer rate constants kct are 2.1 ×10-4 and 5.2 ×10-5s-1 respectively. The activation enthalpy and the activation entropy of these two processes are 1.2×1O2,0.8 ×102kJ ’mol -1 and 5. 1×102, 3.6 ×102J·mol-1 ·K-1 respectively.

【基金】 国家自然科学基金
  • 【文献出处】 物理化学学报 ,Acta Physico-chimica Sinica , 编辑部邮箱 ,1995年12期
  • 【分类号】O627
  • 【被引频次】1
  • 【下载频次】81
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