Effect of substituents in the manganese μ-oxo porphyrins catalyzed oxidation of cyclooctane with molecular oxygen

Electron-donating or electron-withdrawing substituents at the porphyrin rings considerably increase the catalytic activity of the manganese monomeric and μ-oxo porphyrins in the oxidation of cyclooctane with molecular oxygen without the use of sacrificial co-reductant. The change in the catalytic activity is due to the nature and number of the substituents in the porphyrin ring.