Oxidovanadium(V) complexes containing hydrazone based O,N,O-donor ligands: Synthesis, structure, catalytic properties and theoretical calculations

Hosseini-Monfared H., Bikas R., Mahboubi-Anarjan P., Blake A. J., Lippolis V., Arslan N. B., ...More

POLYHEDRON, vol.69, pp.90-102, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 69
  • Publication Date: 2014
  • Doi Number: 10.1016/j.poly.2013.11.020
  • Journal Name: POLYHEDRON
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Index Chemicus (IC)
  • Page Numbers: pp.90-102
  • Keywords: Oxidovanadium(V), Molecular structure, Cyclic voltammetry, Spectroscopy, DPI calculation, Catalyst, SUBSTITUTED N-SALICYLIDENEHYDRAZIDES, MODELING SUPRAMOLECULAR INTERACTIONS, VANADIUM(V) COMPLEXES, CRYSTAL-STRUCTURES, OXOVANADIUM(V) COMPLEXES, MAGNETIC-PROPERTIES, METAL-COMPLEXES, SCHIFF-BASE, TRIDENTATE, OXIDATION
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

Two new mono oxidovanadium(V) complexes, [VOL1(OEt)] (1) and [VOL2(OMe)] (2), of the tridentate Schiff base hydrazone-type O,N,O-donor ligands H2L1 and H2L2, obtained by monocondensation of 3-hydroxy-2-naphthohydrazide with 5-bromo-2-hydroxybenzaldehyde and benzoylacetone, respectively, have been synthesized starting from VO(acac)(2) [H2L1 = (E)-N'-(5-bromo-2-hydroxybenzylidene)-3-hydroxy-2-naphthohydrazide; H2L2 = (E)-3-hydroxy-N'-((Z)-4-hydroxy-4-phenylbut-3-en-2-ylidene)-2-naphthohydrazide]. Single-crystal X-ray structure analysis revealed for both complexes a slightly distorted square-based pyramidal NO4 coordination environment around the metal centre, with the aroylhydrazone Schiff bases acting as O,N,O-tridentate, dinegative ligands. The complexes were also characterized by spectroscopic methods in the solid state (IR) and in solution (UV-Vis, H-1 NMR) and by cyclic voltammetric experiments in DMSO, and their properties were interpreted by means of DFT theoretical calculations.