Reactivity of [(CoW12O40)-W-III](5-) with organic radicals in aqueous solution. Evidence for an electron transfer mechanism

被引：10

作者：

Baciocchi, E ^{[1
]}

Bietti, M ^{[1
]}

Steenken, S ^{[1
]}

机构：

[1] MAX PLANCK INST STRAHLENCHEM,D-45413 MULHEIM,GERMANY

来源：

JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2 | 1996年 / 07期

关键词：

D O I：

10.1039/p29960001261

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

The rate constants for reaction of the [12-tungstocobaltate(III) ](5-) ion [(CoW12O40)-W-III](5-) in aqueous solution with a large number of carbon-centered cyclic and acyclic radicals, among them radicals of the alkyl, alpha-hydroxyalkyl, alpha-alkoxyalkyl, alpha-amidoalkyl and benzyl type, have been measured by pulse radiolysis, Except for methyl and ethyl radical and alpha-carboxyalkyl radical anions, the radicals react with rates of the order (1-5) x 10(9) dm(3) mol(-1) s(-1), which corresponds to or is close to diffusion control. From a comparison with oxidants that are able to react by ligand transfer, the oxidant [(CoW12O40)-W-III](5-) is concluded to react by electron transfer.

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页码：1261 / 1263

页数：3

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