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New Mechanistic Aspects of the Fenton Reaction
Author(s) -
RachmilovichCalis Sandra,
Masarwa Alexandra,
Meyerstein Naomi,
Meyerstein Dan,
van Eldik Rudi
Publication year - 2009
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200802572
Subject(s) - chemistry , fenton reaction , reaction mechanism , kinetics , chemical kinetics , medicinal chemistry , catalysis , organic chemistry , physics , quantum mechanics
The kinetics of the Fenton reaction was studied in detail. A second reaction step in the presence of excess H 2 O 2 is attributed to formation of the complex Fe III ( − O 2 H) aq . Therefore, the reaction of Fe(H 2 O) 6 2+ with Fe III ( − O 2 H) aq in the presence of Fe II to form Fe III aq ( k =(7.7±1.5)×10 5 M −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 ( − O 2 H) aq also, then it might be of significant biological importance. The activation parameters Δ H ≠ , Δ S ≠ , and Δ V ≠ for the Fenton reaction were measured under various experimental conditions, and are used in the mechanistic interpretation.