vanadium(iv) schiff base complex: synthesis, characterization, crystal structure and thermal decomposition into v2o5 particles

Vanadium(iv) complex [vo((meo-bph)2en)] (1), (meo-bph)2en=n,n-bis(2- hydroxy-4-methoxybenzophenone)-1,2-ethanediamine, was synthesized and characterized by elemental analyses (chn), ft-ir spectroscopy, thermogravimetry, sem and single crystal x-ray diffraction. the title complex 1 was prepared by the reaction of vo(acac)2, 1,2-ethanediamine and 2-hydroxy-4-methoxybenzophenone (molar ratio 1:1:2). the singlecrystal x-ray analysis of 1 shows that the vanadium(iv) ion is located in a distorted square pyramid (n2o3) environment with the tetradentate schiff base ligand coordinated in equatorial positions and one oxygen atom in the axial position. thermogravimetric analysis shows that the complex 1 decomposes in two stages. finally, the complex was calcinated at 500°c for 3 h and the v2o5 products characterized by ft-ir and sem.