Oxidation, Reduction, and Copper-Carbon Bond Formation in the Reactions of Copper(II) Tetraglycine with Pulse Radiolytically Generated Free Radicals

Louis J. Kirschenbaua, Dan Meyerstein

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14 Scopus citations

Abstract

The reactions of copper(II) tetraglycine (CuIIG4) with a variety of aliphatic free radicals and with -Br2- and OH have been investigated by the pulse radiolytic technique. Three types of reaction are observed: (i) oxidation of CuIIG4 to CuIIIG4 by Br2- and OH; (ii) rapid reduction to copper(I) by CH2OH, CO2-, and (CH3)2COH; (iii) formation of unstable copper(III)-carbon-bonded intermediates with lifetimes from several milliseconds to several seconds with CH2C(CH3)2OH, CH2CO2-, and CH2C(OH)CH3 radicals. Rate constants are reported for formation and decomposition of all intermediates and the relative instability of neutral CuIII(H-2G4) compared to CuIII(H-3G4) is confirmed by direct observation.

Original languageEnglish
Pages (from-to)1373-1379
Number of pages7
JournalInorganic Chemistry
Volume19
Issue number5
DOIs
StatePublished - 1 Jan 1980
Externally publishedYes

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