Oxidation of alcohols using a manganese (II) complex based on a pentakis benzimidazole amide ligand

A pentakis benzimidazole based penta-amide ligand diethylenetriamine—N,N,N′,N′,N″-pentakis(2-methyl benzimidazolyl)penta-amide [GBDTPA] has been synthesized and utilized to prepare Mn (II) complexes of general composition [Mn2(GBDTPA)X4], where X is an exogenous anionic ligand (X = Cl−, NO3− and Br−). The oxidation of alcohols has been investigated using [Mn2(GBDTPA)Cl4] as the catalyst and TBHP as an alternate source of oxygen. The respective aldehydic products have been isolated and characterized by 1H NMR.