Chemistry of molecular and supramolecular structures of vanadium(IV) and dioxygen-bridged V(V) complexes incorporating tridentate hydrazone ligands

Vibrational spectroscopic studies and computational study of quinoline-2-carbaldehyde benzoyl hydrazone

“…Benzhydrazide (Sigma Aldrich) and quinoline-2-carbaldehyde (Sigma Aldrich) were used as received. The title compound is prepared by protocol reported by Mangalam et al [39]. Benzhydrazide (0.136 g, 1 mmol) dissolved in methanol (10 cm 3 ) was added to a hot solution of quinoline-2-carbalde- Elemental analyses were carried out using a Vario EL III CHNS analyzer at SAIF, Kochi, India.…”

Synthesis, spectral and structural studies of oxovanadium(IV/V) complexes derived from 2-hydroxyacetophenone-3-hydroxy-2-naphthoylhydrazone: polymorphs of oxovanadium(V) complex [VOL(OCH3)]

“…In the IR spectra of the complexes, the shifting of m(C=N) (azomethine) of the ligand to lower wavenumbers in the metal complexes (1597-1602 cm -1 ) indicates the coordination of azomethine nitrogen to the metal [12,18]. The complexes containing lattice water have IR bands in the range 3200-3500 cm -1 .…”

“…The richness and importance of vanadate chemistry have emerged for quite some time [5][6][7]. In continuation of our work on the synthesis and characterization of aroyl hydrazones and their coordination compounds [8][9][10][11][12], we report here the synthesis and characterization of oxovanadium (IV/V) complexes of 2-hydroxyacetophenone-3-hydroxy-2-naphthoylhydrazone (H 2 L) along with the crystal structure of an oxovanadium(V) complex existing in two polymorphic forms. In addition to the azomethine nitrogen and carbonyl oxygen, the coordinating capacity of the ligand has been enhanced by the presence of coordinating oxygen in the phenyl ring of aromatic ketone.…”

Versatile binding properties of a di-2-pyridyl ketone nicotinoylhydrazone ligand: Crystal structure of a Cu(II) complex

“…Recently we have reported the synthesis and characterization of some new hydrazones and their vanadium complexes [9]. We have been interested in the chemistry of polypyridyl containing ligands and as an extension of our previous work [9] we have used di-2-pyridyl ketone nicotinoylhydrazone as a precursor to synthesize and characterize a series of Cu(II) complexes.…”