Syntheses of new oxovanadium(IV) complexes with some new Schiff bases derived from salicylaldehyde or substituted salicylaldehyde and 3-aminothiophenol

Abstract

SummaryThe syntheses of several new oxovanadium(IV) complexes of new Schiff bases derived from salicylaldehyde, 5-ch orosalicylaldehyde, 5-bromosalicylaldehyde, 5-nitrosalicylaldehyde, 4-methoxysalicylaldehyde, 2 -hydroxy-1-naphthaldehyde and 3-aminothiophenol are described. The complexes, which are of the VOL2 type, have been characterized on the basis of elemental analysis, i.r. and electronic absorption spectra, and magnetic susceptibility measurements. The Schiff bases behave as bidentate ligands and a five-coordinate square-pyramidal structure is suggested for the complexes which exhibit two or three spin-allowed d-d bands at ca. 12000, 17000 and 22000 cm -l. The u(V=O) vibration occurs in the 940-980 cm -1 range. The complexes exhibit normal magnetic moments (#eff = 1.71--1.73 B.M.) at room temperature.

Synthesis, Characterization and Antimicrobial Studies of Schiff Base Ligand Derived from Cefadroxil and Benzaldehyde

“…The general formula of a Schiff base is RHC = N-R1, where R and R1 are alkyl, aryl, cycloalkyl or heterocyclic [3] . The Schiff base complexes with many transition metal ions have attracted considerable interest because of their growing importance as model molecules for biological systems such as oxygen carriers [4][5][6][7] . Schiff bases are common ligands in coordination chemistry.…”