Dinuclear triple helical Mn(III), Fe(III) and Co(III) complexes

Abstract

Synthesis, characterization and physical properties of the dinuclear triple helical complexes [Mn2(μ-L)3] (1), [Fe2(μ-L)3] (2) and [Co2(μ-L)3] (3) with the tetradentate Schiff base (H2L) derived from 1 mol equiv. of hydrazine and 2 mole equiv. of 2-hydroxy-1-naphthaldehyde are described. Triple helical molecular structures of 2 and 3 have been confirmed by X-ray crystallography. Magnetic susceptibility measurements reveal complex 3 is diamagnetic while a weak antiferromagnetic interaction is operative between the metal centres in both 1 and 2. © 2007 Elsevier Ltd. All rights reserved.