The properties of Mn porphyhrins: the ability to catalyze dismutation of O2ā¢ā (kcat) , the redox ability, i.e. the metal centered redox potential (E1/2), and the lipophilicity as given by the ratio of the compound and solvent path on TLC silica plates (solvent KNO3sat H2O:H2O: acetonitrile= 1:1+8).