Effect of fumarate on the kinetics and reaction mechanism of Cu+aq with dioxygen

Nadav Navon, Haim Cohen, Rudi Van Eldik, Dan Meyerstein

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10 Scopus citations

Abstract

The kinetics of the reactions: Cu+aq + O2 ⇄ (CuO2)+aq and (CuO2)+ + Cu+aqH+ 2Cu2+aq + H2O2 were studied applying the pulse radiolysis technique, Kk = (2.3 ± 0.4) × 108 dm6 s-1 mol-2, in good agreement with the value calculated from literature data. The complex CuI(fum) (fum = fumarate) reacts considerably slower than Cu+aq with dioxygen so that the rate law reflects only the reaction of Cu+aq. A comparison of the results with those reported for the ligands L (water, CH3CN, phenanthroline, bipyridine or fumarate) indicates that the ligand affects the stability constant of the CuIL·O2 complex, and for fumarate also the subsequent reaction.

Original languageEnglish
Pages (from-to)3663-3666
Number of pages4
JournalJournal of the Chemical Society. Dalton Transactions
Issue number21
DOIs
StatePublished - 7 Nov 1998
Externally publishedYes

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