Synthesis, characterization and solid state structural studies of oxovanadium (IV) - O, N donor Schiff base chelates

Abstract

VO(IV)-complexes with the Schiff bases viz., 4-chlorobenzylidene-2-amino-4-chlorophenol (CAP), 4-dimethylaminobenzylidene-2-aminophenol (DAP) and 2-hydroxy-1-naphthylidene-4-bromoaniline (HBA) have been synthesized and

characterized by elemental analyses, molar conductance, electronic spectra, FT-IR, ¹H-NMR, ESR, FAB mass, thermal and magnetic susceptibility measurements. FAB mass and thermal data show degradation of complexes. Synthesized complexes have been tested for their reactivity and substitution behaviour. All the three ligands behave as bidentate coordinating through O and N donor. The proposed geometry for the complexes is square pyramidal.

X-ray powder diffraction data show that two complexes are crystallized in tetragonal system. Solid state AC electrical conductivity studies reflect semiconducting behaviour of complexes.