Occurrence of a manganese(III) intermediate in the [MnO4]––SO2 redox reaction
Abstract
Evidence for a manganese(III) intermediate, previously implicated in the [MnO4]––SO2 electron-transfer process, has been obtained by conducting the reaction in the presence of F–. A combination of in situ EPR and electronic absorption spectroscopies was used to follow the reaction course and physico-chemical techniques were used to ascertain the identity of the isolated manganese(III) products. The evidence suggests that in the presence of F– manganese(VII) is directly reduced to manganese(III) and thence to manganese(II).