Abstract
Competition experiments between cyclohexane and various aromatic substrates have been carried out in pyridine-acetonitrile in order to ascertain the steric requirements of the Fe II-H 2O 2 reagent in comparison with the Fe III-H 2O 2 reagent already studied. The latter is distinctly larger and much less reactive than the former. Although these results might indicate that the Fe II-H 2O 2 reagent is simply the hydroxyl radical, the chemistry observed is strictly dependent on the presence of picolinic acid. Without the latter, no significant oxidation of any substrate is observed. Hydroxyl radical formation (Fenton Chemistry) is not considered to be ligand dependent in preceding investigations.
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