Studies and characterization of mixed ligands complexes of VO(IV), Cr(III) and Fe(III)

Three mixed ligand chelates of V(IV), Cr(III) and Fe(III) metal ions with salicylaldehyde (L-1), catechol (L-2) and benzil (L-3) have been prepared and investigated by elemental analysis, molar conductivity, thermogravimetric analysis, magnetic moments, infrared, electronic and electron paramagnetic resonance spectra. The elemental analysis data show the formation of 1:1:1 [M:L:L-1] chelates. The molar conductance measurements reveal the presence of a non-electrolytic nature. The thermogravimetric analysis data display the existence of water molecules in the chelates. The magnetic moment measurements exhibit the presence of paramagnetic phenomena for all chelates. The infrared spectral data show the coordination site via -CHO, -OH and C=O groups of salicylaldehyde catechol and benzil moieties. The electronic absorption spectra exhibit the expected geometrical structures for the prepared chelates. The electron paramagnetic resonance spectra show that the chelates that have a paramagnetic character and support the electronic spectra in the determination of the structure.