Synthesis and characterization of monomeric Mn (IV) and pseudo-tetrameric Mn (III) complexes: Magnetic properties of Mn (III) complex

Abstract

Two novel monomer Mn (IV) [Mn(3,5-ClL1)(2)]center dot(CH3OH), (1), [3,5-ClL1H(2) = N-(2-hydroxyethyl)-3,5-dichlorosalicylaldimine] (1) and hydrogen-bonded pseudo-tetramer Mn (III) [Mn(5-BrL2)(H2O)(2)](2)center dot[Mn(5-BrL2)(H2O)](2)center dot 2 center dot(ClO4), (2), [5-BrL2H(2) = N,N'-bis(5-bromosalicylidenato)-1,2-diamino-2-methylpropane)] (2) Schiff base complexes have been synthesized and their crystal structures have been determined by single crystal X-ray diffraction analysis. A variable temperature magnetic susceptibility measurement study has been performed for complex (2) and the result indicates there is a very weak antiferromagnetic interaction (J = -0.40 +/- 0.016 cm(-1)) between the two manganese (III) centers.