J. Caram, M. Mirífico, E. Vasini
Jul 1, 1994
Citations
0
Influential Citations
27
Citations
Journal
Electrochimica Acta
Abstract
The equilibrium between I and the product resulting from the addition of ethanol to one of its CN double bonds: 3-ethoxy- 3,4- diphenyl- 1,2,5-thiadiazoline 1,1-dioxide (II), is studied by electrochemical methods in ethanol (EtOH)—acetonitrile (ACN) solvent mixtures. The equilibrium constant is measured and a complete mechanism for the electroreduction of I and II in ACN solutions containing EtOH is proposed. The voltammetric properties of the newly synthesized compound 3-ethoxy- 2- methyl- 3,4- diphenyl- 1,2,5-thiadiazoline 1,1-dioxide (IV) are also reported. A stabilization of the dianion of I by alkali-metal cations, such as K+, Na+ and Li+, and divalent cations (Sr2+ and Mg2+) is voltammetrically measured. Equilibrium constants are estimated and compared for the interaction of I2− and the alkali-metal cations in ACN solutions of I.