K. P. J. O'Reilly

AN ELECTRON PARAMAGNETIC RESONANCE INVESTIGATION OF THE REACTION OF SOME RADICAL TRAPS WITH OXOMANGANESE PORPHYRINS

The reaction of 2-methyl-N-(phenylmethylene)-2-propanamine N-oxide, 2-methyl-2-nitrosopropane and nitrosobenzene with manganese (III) porphyrins and an oxygen donor system (iodosylbenzene or sodium hypochlorite/phase-transfer catalyst) has been studied using electron paramagnetic resonance investigations. In the reaction of 2-methyl-N-(phenylmethylene)-2-propanamine N-oxide with the oxomanganese porphyrin a t-butyl radical is generated which is trapped by 2-methyl-N-(phenylmethylene)-2-propanamine N-oxide; furthermore an acylaminoxyl radical is also observed. The reaction of 2-methyl-2-nitrosopropane and nitrosobenzene with the manganese (III) porphyrins and the oxygen donor system generates the corresponding di-t-butyl- and diphenyl-aminoxyl radicals, respectively; in the case of 2-methyl-2-nitrosopropane as the substrate an acylaminoxyl radical is also detected