镉(Ⅱ)-氮杂芳香碱-邻氨基苯甲酸三元体系配位平衡

Study on the Coordination Equilibria of Cadmium(Ⅱ)-Containing Nitrogen Aromatic Base-o-Aminobenzoic Acid Ternary Systems

用 pH-电位滴定法研究了镉(Ⅱ)-氮杂芳香碱(2,2′-联毗啶、邻二氮菲)-邻氨基苯甲酸三元体系在溶液中的配位平衡;测定了在15℃,25℃,35℃,45℃以及离子强度μ=0.1(KNO3)时1∶1∶1三元配合物的稳定常数;求出了上述配合物的热力学函数,并对配合物的稳定性进行了讨论.

The coordination equilibria of cadmium (Ⅱ)-2,2'-bipyridyl (or 1,10-phenanthro- line)-o-aminobenzoic acid ternary systems by using potential-pH titrimetry have been studied.The formation constants of 1:1:1 mixed ligand complexes at 15℃,25℃, 35℃,45℃ and ionic strength μ=0.1 (KNO_3) have been determined.The thermodynam- ic functions of the coordination compounds have been calculated,and the stability of the coordination compounds was discussed.