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M(Bic) (Bzim) +(M2 +=Cu2 +,Ni2 +和Zn2 +,Bic-=N ,N 双 (羟乙基 )甘氨酸的单电荷阴离子 ,Bzim =苯并咪唑 )在水溶液中的稳定常数用pH电位滴定法进行了测定 ,同时Cu(Bic) (Bzim) +的稳定常数还用分光光度法进行对比 .结果表明 ,Bic-和苯并咪唑的πA πB 协同作用使得三元金属混配配合物具有较强的稳定性 ,其中Zn(Bic) (Bzim) +比其他 2个金属配合物具有相对较高的稳定性 .[Cu(Bic) (Bzim) ]·ClO4的单晶X衍射分析表明 ,铜原子位于三角双锥的中心 ,三角平面由 1个羧基氧原子和 2个羟基氧原子组成 ,轴向位置由Bic-的氮原子和苯并咪唑的氮原子占据 .在水溶液中Cu(Bic) (Bzim) +的结构与其晶体结构有所不同 ,ESR和电子吸收光谱结果指出 ,此配合物在水溶液中是八面体构型 .
Stable in aqueous solution of M (Bic) (Bzim) + (M2 + = Cu2 +, Ni2 + and Zn2 +, Bic- = N, single charge anion of N bis (hydroxyethyl) glycine, Bzim = benzimidazole) The constants were determined by pH potentiometric titration and the stability constants of Cu (Bic) (Bzim) + were also compared by spectrophotometry.The results showed that the πA πB interaction between Bic- and benzimidazole led to the ternary metal mixture The complex of Zn (Bic) (Bzim) + has a relatively higher stability than the other two metal complexes. [X - ray diffraction analysis of Cu (Bic) (Bzim)] ClO4 It is shown that the copper atom is located in the center of the triangular double cone which is composed of one carboxyl oxygen atom and two hydroxyl oxygen atoms and the axial position is occupied by the nitrogen atom of Bic- and the benzimidazole nitrogen atom. Bic) (Bzim) + has a different crystal structure from its crystalline structure. The results of ESR and electron absorption spectroscopy indicate that the complex is octahedral in aqueous solution.