Preparation and Characterization of Molybdenum and Vanadium Complexes in Different Oxidation States with Theoretical Studies

Abstract

This thesis describes the preparation and characterization complexes of transition metal ions of the Mo (VI) and VO(II) with (Bidentate and Monodentate) ligands in different molar ratio, as well as their mixed–ligands complexes with, Bipyridine(Bipy), 3-Aminopyridine (APY), 2-Hydroxy-1,4-naphthoquinone (HNQ) ligands. This work can be briefed as follow. The FT-IR spectra of the prepared complexes showed that all the ligands act as bidentate and monodentate coordination with Mo (VI) V(IV) ions. The magnetic susceptibility at 25 ºC shows that the VO (II) complexes at (298 Kº) are paramagnetic, while Mo (VI) complexes are diamagnetic. The complexes were characterized by spectroscopic techniques such as: (FTIR, UV–Vis, and GC-Mass spectroscopy), along with (melting point, molar conductivity, and magnetic susceptibility measurements). Molar conductivity measurements of the Mo (VI), and VO(II) complexes in DMSO show that some complexes are non-electrolyte and other some are ionic nature. The spectroscopic data, molar conductivity and magnetic susceptibility measurements are octahedral for Mo (VI) complexes and square pyramidal for VO(II) complexes arrangement.