Cu^(2+)的柠檬酸配合物与大环配体交换反应的研究

A Study of Ligand Exchange Reaction between Cu^(2+)-Complexes and Macrocyclic Compound

本文在λ=760nm,I=0.5×10~3mol/m^3(KNO_3),T=25℃,[Cu^(2+)]_(tot)=10[CyH]_(tot),和pH为3.30、3.50条件下,测定了大环配体5,5,7,12,12,14-六甲基-1,4,8,11-四氮杂环十四烷-N′-乙酸(简写为CyH)与Cu^(2+)的柠檬酸(LH_3)配合物配体交换反应。用ELORMA等计算程序算出假一级反应的表现速率常数k_(obs)以及双分子反应速率常数k_(Cu)^(CyH)和k_(CuL)^(CyH),且得到了相应的关系式。

This paper reports on the ligand exchange reaction of 5, 5, 7, 12, 12, 14-hexamethyl-1, 4, 8, 11-tetraazacycloteradecane-N′-acetic acid with Cu^(2+)-Complexes. The bimolecular reaction rate constants k_(Cu)^(CyH) and k_(CuL)~CyH) (LH_3=citric acid)are presented and the charge effect on the bimolecular reaction rate analysed and explained.