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本文研究了Zn,Cd和Hg-1,3PDTA(1,3-丙二胺四乙酸)配合物的分子内交换过程的动力学.实验结果表明Mg,Ca和Sr-1,3PDTA配合物其配位健具有较大的迁移性,而Zn、Cd和Hg配合物分子内健的迁移性较小,属于长寿命的配位健.用全线型分析方法模拟了Zn、Cd和Hg配合物随温度变化的~1H NMR谱,得到了有关分子内过程的热力学参数.并讨论了N原子反转过程的活化能与中心金属离子的离子势之间的关系.
In this paper, the kinetics of the intramolecular exchange of Zn, Cd and Hg-1,3PDTA (1,3-propanediaminetetraacetic acid) complexes was studied.The experimental results show that the complexes of Mg, Ca and Sr-1,3PDTA There is a large mobility of bit Kin, while the migration of Zn, Cd and Hg complexes is less, which is a long-lived coordination partner.The Zn, Cd and Hg complexes are simulated with temperature The change of ~ 1H NMR spectra obtained the thermodynamic parameters related to the intramolecular processes, and discussed the relationship between the activation energy of the N atom inversion and the ion potential of the central metal ion.