Kinetics and mechanism of oxidation in the diaqua(nitrilotriacetato)cobaltate(II)/N-bromosuccinimide reaction: evidence for iron(II) catalysis

被引：10

作者：

Abdel-Khalek, AA ^{[1
]}

Khaled, ESH ^{[1
]}

机构：

[1] Cairo Univ, Fac Sci, Dept Chem, Beni Suef, Egypt

来源：

TRANSITION METAL CHEMISTRY | 1998年 / 23卷 / 02期

关键词：

D O I：

10.1023/A:1006915730770

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Oxidation of the diaqua(nitrilotriacetato)cobaltate(II) complex, [Co(II)nta(H2O)(2)](-), by NBS has been studied in aqueous medium. The kinetics of the reaction in the presence of an iron(II) catalyst obey the rate law: d[Co-III]/dt = [Co(II)nta(H2O)(2)(-)]{[Fe2+](k(8) + k(9)K(1)/[H+]) + [NBS](k(12)k(10)/k(-10)k(12)) + K(1)k(11)k(13)/(k(-11) + k(13))[H+]} Catalysis by iron(II) is believed to be due to the oxidation of iron(II) to iron(III), which acts as the oxidizing agent. The thermodynamic activation parameters were calculated and we propose that electron transfer proceeds through an inner-sphere mechanism.

引用

页码：201 / 205

页数：5

共 17 条

[1] KINETIC-STUDIES OF THE OXIDATION OF CHROMIUM(III) BY N-BROMO-SUCCINIMIDE [J].