New mechanistic aspects of the fenton reaction

Sandra Rachmilovich-Calis, Alexandra Masarwa, Naomi Meyerstein, Dan Meyerstein, Rudi Van Eldik

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102 Scopus citations


The kinetics of the Fenton reaction was studied in detail. A second reaction step in the presence of excess H2O2 is attributed to formation of the complex FeIII(-O2H) aq. Therefore, the reaction of Fe(H2O)6 2+ with FeIII(-O2H)aq in the presence of FeII to form FeIIIaq (K = (7.7 ± 1.5) × 105M-1 s-1 may contribute to the overall Fenton reaction, and could account for some of the debate in the literature concerning its detailed mechanism. If this is correct for LFe III(-O2H)aq also, then it might be of significant biological importance. The activation parameters δH , ΔS, and ΔV for the Fenton reaction were measured under various experimental conditions, and are used in the mechanistic interpretation.

Original languageEnglish
Pages (from-to)8303-8309
Number of pages7
JournalChemistry - A European Journal
Issue number33
StatePublished - 17 Aug 2009


  • Activation parameters
  • Fenton reaction
  • Kinetics
  • Mechanism
  • Oxidation


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