Abstract
Metalloporphyrins, because of their ability to enter into reactions involving valence change and/or ligand oxidation-reduction mechanisms, are suitable catalysts for a variety of redox processes. Autoxidation reactions catalyzed by metalloporphyrins are reviewed, and their oxygen-activating performance as well as the reactivity of the oxygen adducts towards aldehydes and hydrocarbons are discussed. The role of porphyrin π cation radicals in these processes is emphasized.The importance of such factors as presence of substituents in the porphyrin macrocycle, type of solvent and nature of the axial ligand for the initiation step and the selectivity of autoxidation reactions is discussed.
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