Synthesis, Structural Characterization, and Electrochemical Studies of New Oxovanadium(V) Complexes Derived from 2-Furanoylhydrazon Derivatives. (23rd October 2012)

• Record Type: Journal Article
• Authors: Bikas, Rahman; Hosseini-Monfared, Hassan; Jeanneau, Erwann; Shaabani, Behrouz
• Other Names: Portalone Gustavo Academic Editor.
• Is Part Of: Journal of chemistry. Volume 2013(2013)
• Publication Date: 2012-10-23
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1155/2013/546287
• Languages: English
• ISSNs: 2090-9063

Abstract

Abstract : Five monooxovanadium(V) complexes [VO(L 1 )(OCH3 )(OHCH3 )] (1), [VO(L 2 )(OCH3 )(OHCH3 )] (2), [VO(L 3 )(OCH3 )(OHCH3 )] (3), [VO(L 4 )(OCH3 )(OHCH3 )] (4), and [VO(L 5 )(OCH3 )(OHCH3 )] (5) were synthesized and characterized by IR, NMR UV-Vis, and single-crystal structure analysis [H 2 L 1 = ( E ) -N′ -((2-hydroxynaphthalen-1-yl)methylene)furan-2-carbohydrazide, H 2 L 2 = ( E ) -N′ -(2-hydroxybenzylidene)furan-2-carbohydrazide, H2 L 3 (E)-N′ -(5-bromo-2-hydroxybenzylidene)furan-2-carbohydrazide, H 2 L 4 = ( E ) -N′ -(2-hydroxy-5-nitrobenzylidene)furan-2-carbohydrazide, H 2 L 5 = ( E ) -N′ -(2-hydroxy-5-iodobenzylidene)furan-2-carbohydrazide]. In all 1–3 structures the vanadium atom has a distorted octahedral coordination with the three meridional donor atoms from the Schiff base dianion (L 1–3 )2 − and one methoxylato group occupying the sites of the equatorial plane. The oxo group and one methanol molecule occupy the apical sites. In the complexes 1, 2, and 3 the conformation of 2-furanyl oxygen atom relative to the carbohydrazide oxygen atom is s -anti, s -anti/ s -syn, and s -syn at 293 K, respectively. Cyclic voltammetric experiments of the solution species 1–5 in DMSO revealed a quasi-reversible behavior.