New Nematicidal Active Compounds : Design and Eco-friendly Synthesis and Characterization of Oxovanadium ( V ) Complexes with Schiff Base Ligands

A new series of oxovanadium(V) complexes have been synthesized with Schiff base ligands by microwave assisted method. Oxovanadium(V) complexes have been prepared by reactions of VOCl3 with [2-(3-nitrophenylmethylene) hydrazinecarboxamide] (LH) and[2-(3-nitrophenylmethylene) hydrazinecarbothioamide] (LH) in 1:1 and 1:2 molar ratios in methanol. The Schiff base ligands and their oxovanadium(V) complexes were characterized by elemental analysis, melting point and molecular weight determinations, IR, U.Vvis, and H-NMR spectral studies. The spectral data reveal that all the complexes show a pentaand hexa-coordinated environment around the metal ion. These ligands and their complexes were screened for their nematicidal activity. The results show that the complexes exhibit promising nematicidal activity. The results reveal that the metal chelates are more potent than the parent ligands.