N,N′—双(2—氨基苯基)—1,3—丙二酰胺和铜(Ⅱ)、镍(Ⅱ)的配合作用

Coordination of N, N'—Bis(2—aminophenyl)—1,3—malondiamide with Copper(Ⅱ)and Nickel(Ⅱ)

首次合成一种开链配体,N,N′N—双(2—氨基苯基)—1,3—丙二酰胺。当它与二价铜,镍离子配位时,酰胺基去质子化,生成1:1的中性配合物。配位反应经电位滴定和紫外—可见光谱滴定证实,水溶液中配体与上述离子配位的同时,酰胺基去质子化的 pH 值分别为4和7。配体及共配合物经元素分析、电导测定、红外光谱,紫外—可见光谱及~1H 核磁共振谱表征与式示的组成和结构相符。

In this paper a novel dioxo-N_4 ligand,N,N'-bis(2-aminophenyl)-1,3- malondiamide or dibenzodioxo-2,3,2-tetraamine abbreviated as L,was synthesized.It encloses divalent transition metal ions to form 1:1 neutral complexes M(Ⅱ)L,(M=Cu,Ni).It was demonstrated by PH-potentiometric titration in aqueous solution that the two amide groups are deprotonated due to coordination with metal ions at pH values 4 and 7.The ligand and complexes were characterized by elemental analysis,conductivety measurement,IR,UV-Vis spectra and ~1Hn.m.r..