Different oxidation mechanisms of MnII(polyphosphate)n by the radicals and

Amir Mizrahi, Israel Zilbermann, Eric Maimon, Haim Cohen, Dan Meyerstein

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The kinetics and mechanisms of the oxidation of (Formula presented.) and of (Formula presented.) by the biological relevant radicals (Formula presented.) and (Formula presented.) were studied. The rate constants of the oxidations by both radicals are faster for the (Formula presented.) complexes than for the (Formula presented.) complexes, though the redox potentials predict the reverse order of reactivity. Surprisingly, the results point out that these two radicals react via different mechanisms. Thus, the increase in the concentration of the ligands decreases the rate constants of the oxidations by (Formula presented.) , whereas it increases the rate constants of the oxidation by (Formula presented.). These results point out that these radicals behave differently though both are inner-sphere oxidants. The plausible mechanisms of reaction of these radicals are discussed.

Original languageEnglish
Pages (from-to)1709-1721
Number of pages13
JournalJournal of Coordination Chemistry
Volume69
Issue number11-13
DOIs
StatePublished - 2 Jul 2016

Keywords

  • Inner sphere
  • Mn(polyphosphate)

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Chemistry

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