Synthesis and Characterization of Molybdenum Metal Complexes with Dinitrogen and Dithiolen Donor Ligands

Abstract

The present study involves the preparation and characterization complexes of transition metal ions of the Mo(IV) and Mo(VI) with diamine ligands and dithiolen , as well as their mixed–ligands complexes with dithiooxamide (DTO) , acetylacetone (acac), Bipyridine(Bipy), Diaminobenzoic acid(DABA), 2-Hydrazinopyridine(HPY). This work can be briefed as follow. preparation of molybdenum complexes by direct reaction with [MoO2(acac)2] as precursor and ligands in different molar ratio. The precursor [MoO2(acac)2] prepared by reaction between molybdenum salt and acetyl acetone and prepared all complexes from reaction between ligands and precursor. The FT-IR spectra of the prepared complexes showed that all the diamine and dithiolen ligands act as bidentate by the two nitrogen and two sulphite atoms in coordination with Mo(IV) and Mo(VI). The magnetic susceptibility shows that the Mo(IV) complexes are paramagnetic, while Mo(VI) are diamagnetic. These complexes were characterized by spectroscopic techniques such as: (FTIR, UV–Vis, 1H-NMR and GC-Mass spectroscopy), along with (melting point, molar conductivity, and magnetic susceptibility measurements).. Molar conductivity measurements of the Mo(IV) and Mo(VI) complexes in DMSO and aqueous solutions show that some complexes are non-electrolyte and other some are ionic nature . The spectroscopic data, molar conductivity, and magnetic susceptibility measurements are mononuclear complexes The results show that the synthetic formulas for the complexes are of with octahedral arrangement. Finally, the present study showed may be uses the molybdenum complexes in medicinal applications as antibacterial and drugs .