Kinetics and mechanism of complex formation between chromium(III) and ethylenediamine-N,N′-diacetic acid

被引：2
|
作者：
Anis, SS [1 ]
机构：
[1] Ain Shams Univ, Fac Sci, Dept Chem, Cairo, Egypt
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2001年 / 72卷 / 01期
关键词：
EDDA; chromium(III) ion; kinetics; complexation;
D O I：
10.1016/S0254-0584(01)00318-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The kinetics of complex formation between chromium(III) ion and ethylenediamine-N,N'-diacetic acid (EDDA) have been studied spectrophotometric ally. The reaction proceeds by a path which is first-order with respect to chromium(III) and EDDA. The rate increases with the increase of pH and temperature. The results are best accounted for by outer-sphere complexation equilibrium involving [Cr(H2O)(5)OH](2+) and EDDA. A rate equation is established which involves k and K-OS (the interchange rate constant and outer-sphere complexation). The hydrolysis constant of the complex was determined and the activation parameters for the reaction have been calculated. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：88 / 92
页数：5
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