meso-2,3-BDTA金属配合物分子内过程的DNMR研究

D NMR Studies on the Intramolecular Process of Metal Ions BDTA Complexes

报道了meso-2,3-BDTA金属Mg、Ca和Hg配合物分子内过程的DNMR谱。通过全线型分析得到有关的热力学参数。用水取代的两种可能过程解释了ΔS~≠变化,测定了Zn、Cd、Pb、In、Sc、Lu和La-BDTA配合物随温度变化的NMR谱,讨论了AB型谱化学位移差和金属离子的半径、电荷及价电子结构间的关系。用BR模型解释了化学位移差随温度变化的原因。

The D NMR spectra of Mg, Ca and Hg-BDTA(meso-2,3-Butanediaminetetraacetate) complexes were investigated in this paper. The thermodynamic parameters are obtained by the complete line shape analysis and the △S≠ values are explained by the H2O displacement mechanism. It is discussed that the chemistry shift differences of Zn, Cd, Pb, In, Sc, La and Lu-BDTA depend on the temperature.