SANDMEYER REACTIONS .2. ESTIMATION OF ABSOLUTE RATE CONSTANTS FOR SOME HYDROGEN-TRANSFER REACTIONS AND FOR THE TRANSFER OF WATER LIGANDS ON CU-II TO ARYL RADICALS BY USE OF A PSCHORR RADICAL CLOCK

被引：21

作者：

HANSON, P ^{[1
]}

HAMMOND, RC ^{[1
]}

GOODACRE, PR ^{[1
]}

PURCELL, J ^{[1
]}

TIMMS, AW ^{[1
]}

机构：

[1] OCTEL CHEM LTD, WIDNES WA8 8NS, CHESHIRE, ENGLAND

来源：

JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2 | 1994年 / 04期

关键词：

D O I：

10.1039/p29940000691

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

The rate constant for the homolytic Pschorr cyclization of 2-benzoylphenyl radical has been estimated for ambient temperature (20 degrees C) by competing the cyclization against intermolecular hydrogen-abstractions from alcohols and assuming the latter to occur at rates equal to those measured by Schuler for 4-carboxyphenyl radical. The cyclization was then used as a radical clock for estimating rate constants for other reductions of aryl radicals and for the transfer of water ligands to aryl radicals from Cu-II. It is found that sulfate ion inhibits the transfer of water and an explanatory mechanism is proposed.

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页码：691 / 696

页数：6

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