new dinuclear methoxo-bridged manganese(iii) complex: synthesis, characterization and usage as new precursor for synthesis of mn2o3 particles

New dinuclear methoxo-bridged manganese(iii) complex [mn2((meo-bph)en)2cl2(m-ch3o)2] (1) was synthesized by template reaction of 2-hydroxy-4-methoxybenzophenone, 1,2-ethanediamine and mncl2×6h2o with molar ration (1:1:1) in methanol as solvent. the title compound 1 was characterized by elemental analyses (chn), fourier transform infrared spectroscopy (ft-ir) and single crystal x-ray diffraction. x-ray result reveal that 1 is dimeric with methoxo bridges between two symmetry equivalent manganese ions. the mn ions are surrounded in a distorted octahedral geometry influenced by jahn-teller effect. the tridentate schiff base ligand meo-bp-en and one of the methoxo-bridges bind in the equatorial mode, whereas in the axial positions, other metoxo-bridge and cl atom bind to the mn ions. thermogravimetric analysis of 1 was studied and display the title compound 1 decompose in three stages. finally, by calcination of 1 at 500 °c for 3 h, we prepared mn2o3 particles and characterized by ft-ir, xrd and sem.