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Vol. 26 No. 22 (2014): Vol 26 Issue 22

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Synthesis, Characterization and Crystal Structures of Oxovanadium(V) Complexes with Benzohydrazone and 8-Hydroxyquinoline

https://doi.org/10.14233/ajchem.2014.17623
Wei-Ming Zhang
Nanjing Institute for the Comprehensive Utilization of Wild Plant, Nanjing 210042, P.R. China
Shao-Song Qian
School of Life Sciences, Shandong University of Technology, Zibo 255049, P.R. China
Zhonglu You
Department of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, P.R. China

Corresponding Author(s) : Wei-Ming Zhang

youzhonglu@126.com

Asian Journal of Chemistry, Vol. 26 No. 22 (2014): Vol 26 Issue 22

Abstract

Two new oxovanadium(V) complexes, [VOL1(HQ)] (1) and [VOL2(HQ)] (2), were prepared by the reaction of [VO(acac)2] (where acac = acetylacetonate), 8-hydroxyquinoline (HHQ) with N'-(5-fluoro-2-hydroxybenzylidene)-4-fluorobenzohydrazide (H2L1) and N'-(5-fluoro-2-hydroxybenzylidene)-4-methoxybenzohydrazide (H2L2), respectively, in methanol. Crystal and molecular structures of the complexes were determined by elemental analysis, infrared and UV-visible spectra and single crystal X-ray diffraction. Complex 1 crystallizes in the orthorhombic space group Pbcn, with unit cell dimensions a = 32.327(2) Å, b = 8.189(2) Å, c = 16.817(1) Å, V = 4451.9(9) Å3, Z = 8, GOOF = 1.060, R1 = 0.0587 and wR2 = 0.0921. Complex 2 crystallizes in the monoclinic space group P21/n, with unit cell dimensions a = 12.4965(8) Å, b = 13.3795(9) Å, c = 13.8324(9) Å, b = 115.555(2)°, V = 2086.5(2) Å3, Z = 4, GOOF = 1.047, R1 = 0.0378 and wR2 = 0.0919. The V atoms in the complexes are in octahedral coordination, with the phenolate oxygen, imino nitrogen and enolate oxygen of the benzohydrazone ligand and the hydroxy oxygen of 8-hydroxyquinoline in the equatorial plane and with the pyridine nitrogen of 8-hydroxyquinoline and one oxo group in the two axial positions. Thermal stability of the complexes was also studied.

Keywords

Benzohydrazone ligand 8-Hydroxyquinoline Oxovanadium complex Crystal structure Thermal property
Zhang, W.-M., Qian, S.-S., & You, Z. (2014). Synthesis, Characterization and Crystal Structures of Oxovanadium(V) Complexes with Benzohydrazone and 8-Hydroxyquinoline. Asian Journal of Chemistry, 26(22), 7703–7706. https://doi.org/10.14233/ajchem.2014.17623
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