Collect. Czech. Chem. Commun. 1992, 57, 263-267

Potentiometric Investigation of Mixed-Ligand Complexes of Co(II), Ni(II) and Zn(II) Ions with Thiosalicylic Acid and Ethylenediamine

Joanna Masłowska and Józef Szmich

Institute of General Food Chemistry, Technical University, 90-924 Łodź, Stefanowskiego 4/10, Poland


Formation of mixed-ligand complexes of Co(II), Ni(II) and Zn(II) ions with thiosalicylic acid (H2SR) and ethylenediamine (en) in aqueous ethanol (50 vol.%) was investigated by the potentiometric method at 298, 313 and 328 K at the ionic strength of 0.1 (NaClO4). The thermodynamic functions ∆G0, ∆H0 and ∆S0 have been evaluated at these temperatures.