Synthesis, X-ray structure and magnetic properties of the azido adducts of quadridentate Schiff base manganese(III) complexes

摘要

Two new azido derivatives of quadridentate Schiff base manganese(111) complexes have been synthesized and characterized structurally and magnetically. X-ray structure analysis revealed that both complexes viz. [Mn-2(L1)(2)(N-3)(2)] (1) and [Mn-2(L2)(2)(N-3)(2)] (2), where H(2)L1 = NAP-(I, 1-dimethylethylene)-bis-(salicylaldiimine) and H(2)L2 = bis(o-hydroxyacetophenone)-ethylenediimine exist as phenoxo-bridged dimer. The magnetic susceptibility of the complexes has been measured in the 5-300 K range. At room temperature the Mn-III ions in complexes I and 2 possess an S 4 ground state. The global magnetic interaction in complex 1 is found to be ferromagnetic, while for complex 2 it is anti-ferromagnetic. (C) 2004 Elsevier Ltd. All rights reserved.