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Two oxidovanadium(V) complexes, [VOLLa] (1) and [VOLLb] (2), where L is the dianionic form of the Schiff base ligand 2-(((2-hydroxyethyl)imino)methyl)-6-methylphenol (H2L), La and Lb are the deprotonated forms of 3-hydroxy-2-methyl-4H-pyran-4-one (HLa) and 2-ethyl-3-hydroxy-4H-pyran-4-one (HLb), respectively, have been prepared and characterized by elemental analyses, IR, UV-Vis, 1H NMR and single-crystal X-ray crystallographic determination. The V atoms in the complexes are in octahedral coordination, with the Schiff base ligand mer-coordinated to the metal atoms through the phenolate O, imino N and hydroxyl O atoms, and with the pyrone ligands coordinated to the metal atoms through the two O atoms. The effect of the compounds on the antimicrobial activity against Staphylococcus aureus, Escherichia coli, and Candida albicans was studied.

Synthesis, Characterization and Crystal Structures of Oxidovanadium(V) Complexes with Schiff Base and Pyrone Ligands and Their Antimicrobial Activity