Synthesis and characterization of vanadium (IV) and (V) complexes with 2,2`-bipyridine ligand

Abstract

Four vanadyl VO(II) and vanadate V(V) with 2,2`- bipyridine complexes were synthesized. Different techniques have been used to characterize the complexes such as FT-IR, UV-Vis., mass, 1H-NMR spectroscopy and magnetic susceptibility. The acquired data show that 2,2`-bipyridine is bound through the nitrogen atoms of the two rings. Mass spectroscopic data showed that the complexes (1- 3) were dinuclear while the complex (4) was mononuclear. The FT-IR, UV-Vis and 1H-NMR data confirmed the proposed structures of the complexes square pyramidal geometry structures for 1-2 complexes and octahedral geometry structures for 3-4 complexes. All complexes are stable, non-hygroscopic and ionic except the complex (1).