Abstract

The mixed-ligand complex formation in the systems Cd2 ? Edta4-(CH2)n(NH2)2, n = 2 (En), 6 (L) has been NMR and calorimetrically studied in aqueous solution at 298.15 K and the ionic strength of I = 0.5 (KNO3). The thermodynamic parameters of formation of the CdEdtaL 2- , CdEdtaHL - , (CdEdta)2L 4- , and (CdEdta)2En 4- complexes have been determined. The most probable coordination mode for the complexone and the diamine ligand in the mixed-ligand complexes was discussed.

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