ELECTROCHEMICAL INVESTIGATION OF IRON(III) COMPLEXES WITH SOME KOJIC ACID-DERIVATIVES

The electrochemical reduction of [(FeL3)-L-III] complexes, where L is anion of kojic acid, some kojic acid derivative, and maltol, has been investigated in methanol solution by cyclic voltammetry at a platinum electrode. The reduction of seven [(FeL3)-L-III] complexes into [(FeL3 )-L-II](-) anions occurs at a potential from -0.66 V to -0.80 V vs. fe rrocenium/ferrocene potential. The modification of the kojic acid with various substituents influences the redox properties of the studied c omplexes according to the ligand delocalization. The relative stabilit y of the complexes beta(Fe-II)/beta(Fe-III) was influenced by the degr ee of the ligand delocalization.