新型酰胺金属配合物的热力学稳定性研究  

Thermodynamic Studies on a New Type of Carboxamide Metal Complexes

作　　者：高东昭[1] 郭延河[1] 朱守荣[1] 林华宽[1] 许新合[1] 

机构地区：[1]南开大学化学系,天津300071

出　　处：《高等学校化学学报》2004年第4期740-742,共3页Chemical Journal of Chinese Universities

基　　金：国家教育部外事司留 ( 0 1) 3 45项目资助

摘　　要：N,N-Bis(2-pyridylmethyl)-amine-N-ethyl-2-pyridine-2-carboxamide was synthesized and characterized according to the literature. At 25 ℃, I=0.1 mol/L KNO 3, the stability constants of the binary system formed by the ligand with metal ions in ethanol aqueous solution were studied by pH potentiometric titration and the appropriate structures with respect to the titration species were proposed. The results show that the stability order of divalent metals binding to the ligand is Co<Ni>Cu<Zn which does not conform to the order of the Irving-Williams series. Then the abnormal property of copper complex is discussed.N,N-Bis(2-pyridylmethyl)-amine-N-ethyl-2-pyridine-2-carboxamide was synthesized and characterized according to the literature. At 25 ℃, I=0.1 mol/L KNO 3, the stability constants of the binary system formed by the ligand with metal ions in ethanol aqueous solution were studied by pH potentiometric titration and the appropriate structures with respect to the titration species were proposed. The results show that the stability order of divalent metals binding to the ligand is Co<Ni>Cu<Zn which does not conform to the order of the Irving-Williams series. Then the abnormal property of copper complex is discussed.

关 键 词：酰胺 金属配合物 热力学稳定性 吡啶-2-甲酰胺配体 Irving—Williams序列 

分 类 号：O641.4[理学—物理化学] O642.4[理学—化学]