N,N’—双(2-羧基苯基)草酸二酰胺的合成及其配合物稳定常数

Sgnthesis of N,N'-bis(2-carboxyl benzenoid)-Oxamide and Stability Constants on Its Metal Complexes

首次合成了一种链式苯并酰胺配体N,N’—双(2-羧基苯基)草酸二酰胺.其熔点为281℃,对该配体进行了红外光谱测定,用连续变化光度法在非水溶剂DMF溶液中测定该配体和三种过渡金属离子Cu2+、Zn2+、Co2+所形成配合物的稳定常数.实验表明,配位情况类似低肽的配合物,配位比为1∶1,稳定性顺序Cu2+>Zn2+>Co2+与Irving-Williams顺序一致.

N, N＇-bis （2- carboxyl benzenoid） -Oxamide was synthesized and characterized by IR. The mea- sured m. p. was 281 ℃. Stability constants of the complexes formed by N, N＇ - bis （2 - carboxyl benzenoid） - Oxamide with three transitional metal ions, Cu^2＋, Zn^2＋, Co^2 ＋ were determined by continuous changing spectrophotometry in DMF, at 28℃. Experimental results showed that the circumstances resemble oligopeptide. The ligand was found to form 1 ： 1 complexes with metal ions. The order of their logarithmic values is as follows ： Cu^2 ＋ 〉 Zn^2 ＋ 〉 Co^2 ＋, being in concordance with Irving - Williams order.