ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Complexation Equilibria Between Cadmium(II) and 2-(5'-Ethyl-1',3',4'-thiadiazol-2'-azo)-4-methoxyphenol

J. P. Reyes, J. P. P. Trujillo, and J. J. Arias

Department of Analytical Chemistry, University of La Laguna, 38204-La Laguna, Spain

Abstract: The reaction of cadmium(II) with 2-(5'-ethyl-1',3',4'-thiadiazol-2'-azo)-4-methoxyphenol in aqueous medium at I = 0.1 mol dm^-3 was investigated spectrophotometrically. Graphical and numerical calculation methods were used to establish the equilibria in solution and to evaluate the stability constant of the complexes formed (log β₁₀₁ = 3.67 +/- 0.03 and log β₁₀₂ = 7.90 +/- 0.16). The extractions of ETDAMOF and Cd(II)-ETDAMOF complex with benzene were studied and the log K_ex = -8.17 +/- 0.22 was calculated.

Full paper in Portable Document Format: 466a368.pdf

Chemical Papers 46 (6) 368–370 (1992)