Bidentate coordinating behaviour of chalcone based ligands towards oxocations: VO(IV) and Mo(V)

We synthesized and studied the coordinating behaviour of chalcone based ligands derived from DHA and n-alkoxy benzaldehyde and their complexes of VO(IV) and MoO(V). The chalcone ligands are characterized by elemental analyses, UV-visible, IR, H-1 NMR, and mass spectra. The resulting oxocation complexes are also characterized by elemental analyses, IR, H-1 NMR, electronic, electron spin resonance spectra, magnetic susceptibility measurement and molar conductance studies. The IR and H-1 NMR spectral data suggest that the chalcone ligands behave as a monobasic bidentate with O:O donor sequence towards metal ion. The molar conductivity data show them to be non-electrolytes. From the electronic, magnetic and ESR spectral data suggest that all the chalcone ligand complexes of VO(IV) and MoO(V) have distorted octahedral geometry. (C) 2013 Elsevier B.V. All rights reserved.