镍,锌,钴(Ⅱ)-N-(间甲苯基)亚氨基二乙酸-氮三乙酸的量热研究  

Calorimetric Study of Ni(II) ,Zn(II) ,Co(II)-N-(meta-Substituted Phenyl)iminodiacetic Acid-Nitrilotriacetic Acid Ternary Systems

作　　者：周志芬[1] 林华宽[1] 朱守荣[1] 卢祥生[1] 陈荣悌[1] 

机构地区：[1]南开大学化学系,天津300071

出　　处：《化学学报》1997年第11期1066-1071,共6页Acta Chimica Sinica

基　　金：国家自然科学基金资助项目

摘　　要：使用改进的RD-1型热导式量热计测量了镍(Ⅱ),锌(Ⅱ),钻(Ⅱ)- N-(间甲苯基)亚氨基二乙酸-氮三乙酸三元配合物的生成焓,发现其大小按金属离子来说符合Irving-William序列.利用配体的多环水化结构等讨论了该三元配合物的生成焓和相应的二元配合物的生成焓,同时求得了上述三元体系的热力学参数,指出上述三元体系的生成熵是导致这些三元体系具有较大稳定性的根本原因.The protonation heats of N - (meta - substituted phenyl) iminodiacetic acid ( m -CH3PhIDA) ,the heats of formation of Ni(II) ,Zn(II) ,Co(II) - m - CH3PhIDA binary systems and Ni(II) ,Zn(II) ,Co(II) - m - CH3PhIDA- nitrilotriacetic acid(NTA) ternary systems havebeen determined in aqueous solution at 25.0±0.2℃,I= 0.1 mol·dm-3(NaClO4) by means of a model RD-1 automatic conduction calorimeter. To compare the formation heats for metal ions, we found that they obey Irving - Williams order ,i.e.Co(II)<Ni(II)>Zn(II).A supposed structure of the hydrated ligand has been offered to discuss the formation heats of ternary complexes M( II ) - m - CH3PhIDA- NTA and of binary complexes M(II) - m - CH3PhIDA.

关 键 词：多环水化结构 镍 钴 锌 三元 配合物 生成焓 

分 类 号：O614.81[理学—无机化学] O614.241[理学—化学]