Mechanism of iridium(III) catalyzed oxidation of reducing sugars by N-bromosuccinimide in acidic medium

被引：0
|
作者：
Singh, AK [1 ]
Rahmani, S [1 ]
Singh, V [1 ]
Gupta, V [1 ]
Singh, B [1 ]
机构：
[1] Univ Allahabad, Dept Chem, Allahabad 211002, Uttar Pradesh, India
来源：
OXIDATION COMMUNICATIONS | 2000年 / 23卷 / 01期
关键词：
mechanism; Ir (III) catalysis; acidic medium; oxidation; reducing sugars; N-bromosuccinimide;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The kinetics of iridium (III) catalyzed oxidation of mellibiose and cellobiose by N-bromosuccinimide (NSB) in HClO4 in the presence of [Hg(OAc)(2)] as a scavenger for Br- has been investigated. The reactions are zero order with respect to bets sugars, and first order in NBS. The order in Ir (III) decreases from unity to zero at high iridium (III) concentration. A negative effect on the oxidation rate is observed for [H+], [Cl-] and succinimide. Ionic strength and [Hg (III)] do not influence the oxidation rate and HOBr and [IrCl5H2O](2-) are postulated as the oxidizing and catalytic species. A mechanism conforming to the observed kinetic data is proposed.
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页码：55 / 61
页数：7
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