1
Department of Chemistry, Shiraz University, Zip code 71454, Shiraz, I.R. IRAN
2
Department of Chemistry, Razi University, Zip code 67145, Kermanshah, I.R. IRAN
10.30492/ijcce.1997.10329
Abstract
The complexation reactions between methylthymol blue (MTB) and Co2+, Ni2+, Cu2+, Zn2+ and Pb2+ ions have been studied in different water-methanol mixtures at pH 4.45 and 25 °C by a spectrophotometric technique. The stepwise stability constants of the resulting 1:1 and 2:1 (metal ion to ligand) complexes were determined from the absorbance-mole ratio data. It was found that the overall stability constants of the complexes formed increase in the order Zn2+<Co2+<Pb2+<Ni2+<Cu2+ for all solvent mixtures studied. There is an inverse relationship between the overall stability of the complexes and amount of water in the mixed solvent. A linear relationship was observed between log b2 of the complexes and the mole fraction of methanol in the solvent mixture.
Ghavami, R., Abdollahi, H., & Saleem Khan, M. (1997). Spectrophotometric Study of Cobalt, Nickel, Copper, Zinc and Lead Complexes with Methylthymol Blue in Binary Water-Methanol Mixtures. Iranian Journal of Chemistry and Chemical Engineering, 16(1), 22-28. doi: 10.30492/ijcce.1997.10329
MLA
Raoof Ghavami; Hamid Abdollahi; Mohammad Saleem Khan. "Spectrophotometric Study of Cobalt, Nickel, Copper, Zinc and Lead Complexes with Methylthymol Blue in Binary Water-Methanol Mixtures". Iranian Journal of Chemistry and Chemical Engineering, 16, 1, 1997, 22-28. doi: 10.30492/ijcce.1997.10329
HARVARD
Ghavami, R., Abdollahi, H., Saleem Khan, M. (1997). 'Spectrophotometric Study of Cobalt, Nickel, Copper, Zinc and Lead Complexes with Methylthymol Blue in Binary Water-Methanol Mixtures', Iranian Journal of Chemistry and Chemical Engineering, 16(1), pp. 22-28. doi: 10.30492/ijcce.1997.10329
VANCOUVER
Ghavami, R., Abdollahi, H., Saleem Khan, M. Spectrophotometric Study of Cobalt, Nickel, Copper, Zinc and Lead Complexes with Methylthymol Blue in Binary Water-Methanol Mixtures. Iranian Journal of Chemistry and Chemical Engineering, 1997; 16(1): 22-28. doi: 10.30492/ijcce.1997.10329