“…Some of us [70] discovered in 1998 that dinuclear manganese(IV) complex [LMn(O) 3 MnL](PF 6 ) 2 (catalyst 1a, where L is 1,4,7-trimethyl-1,4,7-triazacyclononane, TMTACN; see Scheme 1) catalyzes the oxidation of organic compounds by hydrogen peroxide if a small amount of a carboxylic acid is added to the reaction solution. Further, we demonstrated that the '1a/carboxylic acid/ H 2 O 2 ' combination in acetonitrile solution very efficiently oxidizes various organic compounds [70][71][72][73][74][75][76][77][78][79][80][81][82][83][84][85][86][87] (see also reviews [88][89][90][91][92][93][94]) including inert alkanes [70-76, 78, 81, 82, 85-87] to afford primarily the corresponding alkyl Scheme 1 Catalysts used in the present work hydroperoxides which are transformed in the course of the reaction into the more stable ketones (aldehydes) and alcohols. It turned out that the system oxidizes not only alkanes but also epoxidizes olefins [72, 74-76, 84, 87], transforms alcohols into ketones (aldehydes) [72,77,83] and sulfides into sulfoxides [72].…”