Kinetics and mechanism of oxidation of aquaethylenediaminetetraacetatocobaltate(II) by N-bromosuccinimide in aqueous acidic solution

被引：2

作者：

Eljack, Nasma D. ^{[1
]}

Sulfab, Yousif ^{[1
]}

机构：

[1] Univ Khartoum, Dept Chem, Fac Sci, Khartoum, Sudan

来源：

TRANSITION METAL CHEMISTRY | 2011年 / 36卷 / 01期

关键词：

COMPLEX;

D O I：

10.1007/s11243-010-9438-y

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The oxidation of aquaethylenediaminetetra-acetatocobaltate(II) [Co(EDTA)(H2O)](-2) by N-bromosuccinimide (NBS) in aqueous solution has been studied spectrophotometrically over the pH 6.10-7.02 range at 25 degrees C. The reaction is first-order with respect to complex and the oxidant, and it obeys the following rate law: Rate = kEK(2)K(3) [Co-II(EDTA)(H2O)(-2)](T)[NBS]/([H+]+K-2) It is proposed that the electron transfer proceeds via an inner-sphere mechanism due to the formation of the initial cobalt(III), which is converted slowly to the final product.

引用

页码：87 / 91

页数：5

共 18 条

[1]

Abdel-Khalek A.A., 1995, TRANSIT METAL CHEM, V20, P1

[2]

Abdel-Khalek AA, 1998, INDIAN J CHEM A, V37, P489

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