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Decay kinetics of aryloxy and semiquinone radicals in the presence of copper ions

โœ Scribed by I. V. Khudyakov; V. A. Kuzmin; N. M. Emanuel

Publisher
John Wiley and Sons
Year
1978
Tongue
English
Weight
662 KB
Volume
10
Category
Article
ISSN
0538-8066

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โœฆ Synopsis

Abstract

The decay kinetics of aryloxy and semiquinone radicals in the presence of copper ions in aqueous solutions has been studied by means of the flash photolysis technique. The radicals are involved in electron transfer reactions and those leading to the formation of intermediate complexes with copper ions. The complexes of pโ€benzosemiquinone anion radicals and 2โ€hydroxyphenoxy radicals with cupric ions decay in bimolecular selfโ€reactions at a much slower rate than the original radicals. The increased stability of the complexes compared with the initial radicals is attributed to partial delocalization of the unpaired electron over the electron shell of copper and to steric hindrances in the selfโ€reactions of complexes.

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