Abstract
The formation of mixed-ligand complexes in the M(II)–Ida–L systems (M = Cu, Ni, L = His, Orn, Lys), where Ida is the iminodiacetic acid residue, was studied by pH-metry, calorimetry, and spectrophotometry. The thermodynamic parameters (logK, ΔrG0, ΔrH, ΔrS) of formation of the complexes were determined at 298.15 K and the ionic strength I = 0.5 (KNO3). The most probable mode of coordination of the chelating agent and the amino acid in the mixed-ligand complexes was elucidated.
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