EFFECT OF THE LIGATING ANION ON THE CATALASE ACTIVITY OF DINUCLEAR MANGANESE(II) COMPLEXES OF SCHIFF-BASE MACROCYCLES

Synthesis and catalase activity of a series of dinuclear manganese(II) complexes [Mn-2(X-L(n))(Y)](ClO4), where H-2(X-L(n)) denotes a Schiff-base macrocycle formed by 2:2 condensation of 4-X-2,6-diformylphenol and bis(omega-aminoalkyl)methylamine, are reported, together with the X-ray structure of one complex (X=Me, Y=Cl, n=2); the catalytic activity depends on the nature of the ligating anion Y-, and its proposed that the dissociation of Y- should be involved in the rate determining step.