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vol.56 issue1SEASONAL VARIATION OF THE FLAVONOIDS PINOCEMBRIN AND 3-O-METHYLGALANGIN, IN THE SURFACE COMPONENT MIXTURE (RESINOUS EXUDATES AND WAXY COATING) OF HELIOTROPIUM STENOPHYLLUMREMOVAL OF PHENOLIC COMPOUNDS FROM AQUEOUS SOLUTIONS BY BIOSORPTION ONTO ACACIA LEUCOCEPHALA BARK POWDER: EQUILIBRIUM AND KINETIC STUDIES author indexsubject indexarticles search
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Journal of the Chilean Chemical Society

On-line version ISSN 0717-9707

Abstract

LIU, SHI-YONG; MA, YU-PING  and  YOU, ZHONG-LU. HYDROGEN BOND INDUCED ASSEMBLY AND CRYSTAL STRUCTURES OF DIOXOVANADIUM(V) COMPLEXES WITH SCHIFF BASES. J. Chil. Chem. Soc. [online]. 2011, vol.56, n.1, pp.535-538. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072011000100003.

Two new dioxovanadium(V) complexes, [VO2L1] (1) and [VO2L2]2 (2), where L1 and L2 are the deprotonated forms of 4-chloro-2-[(2-piperidin-1-ylethylimino) methyl]phenol and 2-ethoxy-6-[(2-ethylaminoethylimino)methyl]phenol, respectively, have been synthesized and characterized by i.r. spectra and single crystal X-ray diffraction. Complex (1) is a mononuclear dioxovanadium complex, with the V atom five-coordinate in a distorted square pyramidal geometry. Complex (2) is a dinuclear dioxovanadium complex, with the V atom six-coordinate in an octahedral geometry. The V---V distance is 3.096(2) A. The hydrogen bonds among the Schiff base ligands can influence the structures of the vanadium complexes.

Keywords : Synthesis; vanadium complex; Schiff base; X-ray structure analysis.

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