Synthesis, spectral, electrochemical, magnetic and biological studies of tet-a based binuclear Mn(III) complexes

摘要

A new phenoxo-bridged Tet-a based binuclear manganese(III) complexes were synthesized by the Schiff base condensation reaction of the compound 1,8-[bis(3-formyl-2-hydroxy-5-methyl)benzyl] -5,5,7,12,12,14- hexamethyl -1,4,8,11-tetraazacyclotetradecane (PC-a) and 1,8-[bis(3-formyl-2-hydroxy-5-bromo)benzyl]- 5,5,7,12,12,14-hexamethyl-l,4,8,11-tetraazacyclotetradecane (PC-b) with triethylenetetramine and manganese(II) perchlorate hexahydrate. Their synthesized complexes were confirmed by analytical and spectral analysis. The phenolate oxygen atom is acting as bridge between two unsymmetrically coordinated Mn atoms. Electrochemical studies of the complexes reveal that all the redox processes are irreversible in nature. Low temperature magnetic study shows that the complexes exhibit antiferromagnetic exchange interaction between the two metal ions. The spectral and magnetic behavior of the complexes is discussed.