The interaction between sulfathiazole and cobalt(II): potentiometric studies

AUTOR(ES)

Bellú, Sebastián, Rizzotto, Marcela, Okulik, Nora, Jubert, Alicia

FONTE

Química Nova

DATA DE PUBLICAÇÃO

2007-10

RESUMO

Potentiometric studies of sulfathiazole (HST) in the presence and absence of cobalt(II) were performed. Equilibrium constants for the formation of the detected species, [Co(ST)]+ and [Co(ST)(OH)], are reported. UV-Vis spectrophotometric measurements suggest that the coordination Co(II)-sulfathiazole might be through a N atom, which, in agreement with MO calculations, could be a thiazolic one. In spite of sulfonamides being better ligands at pH >7, [Co(ST)]+ was found at pH » 3.

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