Rates and mechanisms of oxidation of ZnTPP by CCI3O2 radicals in various solvents

Z. B. Alfassi, A. Harriman, S. Mosseri, P. Neta

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Trichloromethylperoxyl radicals were produced by pulse radiolysis of air saturated solutions containing CCl4. The rate constants for the reaction of CCl3O2 radicals with zinc tetraphenylporphyrin (ZnTPP) were determined in various solvents. They were found to vary between 3 × 107 and 3 × 109 M−1 s−1. The changes in rate constants result from complexation of ZnTPP with the different solvents, but did not correspond to changes in redox potential of ZnTPP. The rate constants were found to depend on the strength of the axial complexation, indicating an inner sphere mechanism whereby the radical binds to the metal prior to electron transfer.

Original languageEnglish
Pages (from-to)1315-1321
Number of pages7
JournalInternational Journal of Chemical Kinetics
Volume18
Issue number12
DOIs
StatePublished - 1 Jan 1986
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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