高等学校化学学报

高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (4): 548.

• 论文 • 上一篇    下一篇

Mo(Ⅵ)-邻羟基苄胺-N,N,O-三乙酸与Cu2+交换反应动力学研究

王勇为, 张华麟   

  1. 复旦大学化学系, 200433
  • 收稿日期:1989-11-04 出版日期:1991-04-24 发布日期:1991-04-24
  • 通讯作者: 张华麟
  • 基金资助:

    国家自然科学基金

Studies on the Kinetics of the Metal Exchange Reaction Between o-Hydroxybenzylamine-N,N,O-Triacetic Acid Complex of Mo (Ⅵ) and Cu2+

Wang Yong-wei, Zhang Hua-lin   

  1. Department of Chemistry, Fudan University, Shanghai, 200433
  • Received:1989-11-04 Online:1991-04-24 Published:1991-04-24

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摘要： 邻羟基苄胺-N,N,O-三乙酸(HBATA,H3L)为1种带苯氧乙酸基团的氨羧螯合剂。我们曾报道过它的一些过渡金属络合物在溶液中的稳定性、络合物晶体结构及其与Fe(Ⅲ)的络合反应机理,并探讨了Mo(Ⅵ)、Mo(Ⅴ)与其在水溶液中的络合平衡。本文在10℃、Ⅰ=0.5mol/LNaCl、pH3.31～4.16条件下用截流分光光度法研究了Mo(Ⅵ)-HBATA络合物与Cu2+的交换反应动力学,并确定了反应机理。

关键词: 钼(Ⅵ), 邻羟基苄胺-N, N, O-三乙酸, 交换反应动力学

Abstract: The kinetics of the metal exchange reaction between o-hydroxybenzylamine-N,N,O-tri-acetic acid(H3L) complex of molybdenum (Ⅵ) and cupric ion has been studied by means of stopped-flow technique over the pHrange of 3. 3l-4.16 at 10℃, I=0. 5 mol/L(NaCl). The variation of the pseudo-first order rate constant kobs with [H+] and CCu indicates a SN1 IP mechanism and the following rate equation and reaction scheme were derived on it:(这里有图片199104-500-3.gif).

Key words: Molybdenum(Ⅵ), o-Hydroxybenzylamine-N,N,O-triacetic acid, Exchange reaction kinetics

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