Journal of the Iranian Chemical Society (JICS)
Published by the Iranian Chemical Society P.O.Box: 13145-887, Tehran, Iran Tel: (+98) 21 66908032-33 Fax: (+98) 21 66908030
Home About Editorial Board Instructions to Authors Subscription Archive Submission Feedback
Quick Search 

Article info. : 2004; 1(1) (pp 65~70)


Complexation of Vanadium(IV) with Hydroxamate Chelators and Their Stability Relation with pH

K. Ali, N. Fatima*, Z.T. Maqsood and S.A. Kazmi

Department Of Chemistry, University Of Karachi, Pakistan

Hydroxamic acids, RCONHOH, form highly stable complexes with vanadium(IV) in 1:1, 1:2 and 1:3 molar ratios. The stability constants of the complexes were determined through spectrophotometric and potentiometric methods at various pH and found to be comparable. Acetohydroxamate, benzohydroxamate and salicylhydroxamate were selected for the study. Using the spectrophotometric method, graphical calculations were applied to confirm the results. Potentiometric method associated with computer calculation program BEST was also applied to check the reproducibility of the results.

Keywords: Oxovanadium(IV), Hydroxamates, Spectrophotomery, Potentiometry, Complex stability, Graphical methods


2005 Copyright JICS , Iranian Chemical Society