Syntheses, Crystal Structures and Magnetic Properties of Fe(III), Co(III) and Mixed Valence Mn(II)/Mn(III) Complexes Based on a Schiff Base Ligand Derived From Salicylaldehyde

The Schiff base hmmpH(2) (hminpH(2)=2-[(2-hydroxyethy-limino)methyl]-6-methoxypheno0 was synthesized by o-vanillin and ethanolamine. Complexes [Fe-2(hmmp)(2)(hmmpH)(2). 1.5CH(3)CN .0.5H(2)O (1) and [Co2Na(hmmp)(2)(N-3)(2)(CH3O)(CH3OH)21 (2) were synthesized by using hmmpH(2), ligand. The Schiff base haidbrpH, (hmdbrpH(2)=2-,24(2hydroxyethylimino)methyl]-4,6-dihromophenol) was synthesized by 3,5-dibromosalicylaldehyde and ethanolamine. Complex [Mn(II) Mn (III)(2)(hmdbrp)(2)(O2CPh)(4)(CH3OH)(2)]2CH(3)CN.2CH(3)OH (3) was synthesized by using hmdbrpH(2) ligand. These complexes were fully characterized by elemental analysis and X-ray single crystal diffraction, and complexes 1 and 3 were also studied by magnetic investigation. The structural analysis indicates that in complex 1 two six-coordinated FAD ions are bridged by two alcoholic hydroxyl atoms to form a dieter structure. In complex 2, CAM is six-coordinated with an octahedral coordination environment and the two Con ions are bridged by two 0 atoms from CH3OH constructing a binuclear complex. The complex 3 is a mixed valence trinuclear structure, with three Mn ions in linear array. Magnetic study indicates that the antiferromagnetic interaction exist between FAD ions in complex 1, and in complex 3 antiferromagnetic interactions exist between the Mn(II) and MA(III) ions in the trinuclear manganese unit. CCDC: 1534804, 1; 1534805, 2: 1534806, 3.