SYNTHESIS AND CHARACTERIZATION OF [N,N'-ETHYLENEBIS(3-ETHOXYSALICYLIDENEAMINATO)] OXOVANADIUM(IV)

The synthesis, spectra and X-ray crystal structure of [(VO)-O-IV(3-EtOsalen)] [where 3-EtOsalen is the Schiff base N,N'-ethylenebis(3-ethoxysalicylideneaminate)] are reported. The Gaussian analysis of the visible spectrum of the complex in acetonitrile yielded four peaks, at 12,570, 15,190, 17,010 and 20,710 cm(-1), assigned as the four d-d transitions. In the IR spectra of three samples synthesized in different solvents, two sharp bands appeared at 3524 and 3577 cm(-1). These are assigned as O-H stretching frequencies of the water of crystallization strongly hydrogen bonded to two independent pairs of ligand oxygen atoms. The molecule adopts the square-pyramidal geometry characteristic of oxovanadium(IV) chelates.