SERIES SYSTEMATIC DESIGN OF CHEMICAL OSCILLATORS .83. EQUILIBRIA AND KINETICS OF THE FAST INTERACTION BETWEEN COPPER(II) AND THIOSULFATE IONS IN AQUEOUS-SOLUTION

被引：35

作者：

RABAI, G ^{[1
]}

EPSTEIN, IR ^{[1
]}

机构：

[1] BRANDEIS UNIV,DEPT CHEM,WALTHAM,MA 02254

来源：

INORGANIC CHEMISTRY | 1992年 / 31卷 / 15期

关键词：

D O I：

10.1021/ic00041a014

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The fast reduction of copper(II) by the thiosulfate ion in aqueous solution is preceded by the extremely rapid formation of a Cu(S2O3)22- complex with stability constant beta = (3.6 +/- 0.5) x 10(4) m-2 at 25.0-degrees-C and ionic strength 0.2 M (NaClO4). The tetrathionate ion and a (thiosulfato)copper(I) complex are formed in the redox reaction, the rate of which is second order in [Cu(II)] and independent Of [S2O32-] in high excess of thiosulfate. The limiting value of the observed second-order rate constant is k4 = (1.05 +/- 0.08) x 10(5) m-1 s-1. The mechanism involves an intermolecular rate-determining step between two molecules of the bis(thiosulfato)copper(II) complex.

引用

页码：3239 / 3242

页数：4

共 15 条

[1] Notice on the age of the thiosulphate solutions. [J].