Abstract
Binuclear manganese complexes mimic the catalase enzyme by converting hydrogen peroxide rapidly and efficiently to oxygen and water. The complex (1) may be activated by either periodic acid or Oxone ® and can oxidize selected organic substrates. Potassium manganate gave similar oxidation products suggesting that the manganese is transformed to a higher oxidation state. Kinetic studies with the Mn IV-Mn IV complex show an induction period indicating that it is not the active catalyst. Further studies suggested that the actual catalytic species is a Mn III-Mn IV complex. These complexes show similar properties to the activation of FeCl 3 with hydrogen peroxide. This is particularly evident by the formation of a new and unusual peroxide from ergosterol acetate.
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