The EPR signals of Mn-III(salen) complexes (R,R)-(-)-N,N'-bis(3,5-di-tert-b
utylsalicylidene)-1,2-cyclohexanediaminomanganese(III) chloride 1 and N,N'-
bis(salicylidene)ethylenediaminomanganese(III) chloride 2 were detected and
used for the characterisation of intermediates in catalytic epoxidation.