高等学校化学学报

高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (9): 1436.

• 论文 • 上一篇    下一篇

Zn2TTHA等双核金属配合物的NMR研究

宋瑞方, 毛友铜, 李菲, 秦松岩   

  1. 吉林大学理论化学研究所, 分子光谱与分子结构开放实验室, 长春, 130023
  • 收稿日期:1994-11-23 修回日期:1995-04-25 出版日期:1995-09-24 发布日期:1995-09-24
  • 通讯作者: 宋瑞方,男,57岁,教授.
  • 作者简介:宋瑞方,男,57岁,教授.
  • 基金资助:

    国家自然科学基金

NMR Study of Zn2TTHA and Other Complexes with TTHA

SONG Rui-Fang, MAO You-Gang, LI Fei, QIN Song-Yan   

  1. Institute of Theoretical Chem., Key Lab.for Molecular Spectra and Structure, Jilin Univ., Changchun, 130023
  • Received:1994-11-23 Revised:1995-04-25 Online:1995-09-24 Published:1995-09-24

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摘要： 报道了Zn、Mg、Pb和Hg与TTHA(三乙四胺六乙酸)形成的2:1双核配合物的动态NMR研究。在所研究的温度范围内观测到Zn2TTHA分子内重排过程,并通过模拟谱求出分子内重排过程的速率常数;提出Zn2TTHA在溶液中的构型由2个对称的八面体单元组成,而不是由2个四面体构成的;用二位交换的Bloch方程估计Mg、Pb和Hg双核配合物的活化能Ea值;发现分子内重排活化能大小的顺序与中心金属离子的离子势呈线性关系。

关键词: Zn2TTHA, 动态NMR, 分子内重排

Abstract: The dynamic NMR investigation of Zn, Mg, Pb and Hg binuclear complexes with TTHA(triethylene-tetraaminhexaacetic acid) is reported in this paper,The intramolecular rearrangement of Zn2TTHA is observed in the range of the temperature studied and the rate constants of the rearrangement process are calculated by the simulating to the experimental spectra.It is suggested that the structural units of Zn2TTHA are two octahedral units but not two tetrahedral ones; the activation energies Eaof the binuclear complexes of Mg, Pb and Hg with TTHA are estimated by the Bloch equation of the two sites exchange; and the order of Eais linearly related to the ion potential of the metal ions.

Key words: Zn2TTHA, Dynamic NMR, Intramolecular rearrangement

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