Abstract
Abstract N-Hydroxy-N-p-chlorophenyl-N′-(2-methyl-5-chloro)phenyl-p-toluamidine hydrochloride (HCPMCPTH), a newly synthesized bidentate chelating agent, reacts with vanadium(V) in the presence of monobasic carboxylic acids to give blue-violet water-insoluble adducts. The adducts have been extracted into various organic solvents such as chloroform, benzene, and carbon tetrachloride, and employed for the spectrophotometric determination of vanadium(V) and its separation from diverse ions. Investigations of the vanadium-HCPMCPTH-carboxylic acid complexes by spectrophotometric and solvent extraction techniques showed that the complex had the composition VO(OAm)2OH.HOOCR (where HOAm = hydroxyamidine and HOOCR = carboxylic acid). The molar absorptivity and wavelength of maximum absorption of the mixed complex depend on the nature of the carboxylic acid used.
Published Version
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