三元络合物的动力学研究和机理探讨——钪-铬天青S-溴化十六烷基三甲铵体系  

Studies on Kinetics and Mechanism of Ternary Complex ——Sc-CAS-CTMAB System

作　　者：林智信[1] 蔡汝秀[1] 胡可人 方贤安[1] 安从俊[1] 

机构地区：[1]武汉大学化学系

出　　处：《高等学校化学学报》1990年第8期809-812,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金

摘　　要：本文测定了CAS,Sc-CAS和Sc-CAS-CTMAB体系的吸收光谱,三元络合物组成比为Sc:CAS∶CTMAB=1∶2∶2,用动力学方法获得经验速率方程R=k[Sc(h)][CAS][CTMAB]^(-2),参照Eigen-Tamm机理提出了一种“胶束-溶剂笼”机理,此机理用平衡浓度法处理后,其速率方程与实验结果一致,对三元络合物的几何构型和反应模式也进行了讨论。In the present paper, the absorption spectra in the CAS, Sc-CAS and Sc-CAS-CTMAB systems were measured. According to equiabsorbance diagram the composition ratio ;bf the ternary complex is Sc:CAS:CTMAB=1 :2:2. By kinetics method the obtained results show that its rate equation is R=k[Sc(h)][CAS][CTMAB,]-2. Referring to Eigen-Tamm mechanism a micelle-solvent cage mechanism is suggested. After the mechanism being treated by the equilibrium concentration method the rate equation is consistent with experimental results. The geometrical configuration of the ternary complex and reaction mode are also discussed.

关 键 词：钪络合物 铬天青S CTMAB 动力学 

分 类 号：O614.32[理学—无机化学]