Initial Steps in the Reaction of H2O2 with Fe2+ and Fe3+ Ions: Inconsistency in the Free Radical Theory

Consideration of the changes in free energy shows that assumed initial steps reactions H2O2 with Fe2+ and Fe3+ radical theory are not consistent. The is unable to account for Fe3+-initiated decomposition or oxidations by it. In ions at high [H2O2], where O2 evolution reaches a limit, such limit foreseen model. At lower because disallowed substitution equation used, interpretation valid. It appears, therefore, radicals derived from do provide suitable basis constructing models these reactions. Non-radical more successful interpreting experimental results.