US EPA

1445502 

Journal Article 

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

Bikas, R; Hosseini-Monfared, H; Jeanneau, E; Shaabani, B 

2013 

10.1155/2013/546287 

WOS:000310911600001 

Five monooxovanadium(V) complexes [VO(L-1)(OCH3)(OHCH3)]
(1), [VOL(L-2)(OCH3)(OHCH3)] (2), [VOL(L-3)(OCH3) (OHCH3)] (3), [VO(L-4)(OCH3)(OHCH3)] (4), and
[VOL(L-5)(OCH3)(OHCH3)] (5) were synthesized and characterized by IR, NMR UV-Vis, and single-
crystal structure analysis [H2L1 = (E)-N'-((2-hydroxynaphthalen-1-yl)methylene)furan-2-
carbohydrazide, H2L2 = (E)-N'-(2-hydroxybenzylidene)furan-2-carbohydrazide, H2L3 = (E)-N'-(5-
bromo-2-hydroxybenzylidene)furan-2-carbohydrazide, H2L4 - (E)-N'-(2-hydroxy-5-nitrobenzylidene)
furan-2-carbohydrazide, H2L5 - (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 (L1-3)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.