| abstract |
Disclosed is a compound effective as a catalyst for disproportionating superoxide. A manganese or iron complex of a substituted unsaturated heterocyclic pentaazacyclopentadecane ligand that catalytically disproportionates superoxide. Most preferred are those having cyclohexyl, hydroxylalkylthio, alkyl (2-thioacetic acid) ester, benzyloxy, methoxyarylthio, alkoxycarbonylarylthio and aryl (2-thioacetic acid) ester substituents. Preferably, the nitrogen-containing heterocyclic group is aromatic, more preferably a pyridino group. [Selection figure] None |