Thermochemical Study of Mixed-Ligand Complex Formation
in the system M²⁺Nta³En (M = Ni, Cu, Zn, or Cd)
in Aqueous Solution

E. V. Kozlovskii, D. F. Pyreu, and T. B. Khochenkova

Ivanovo State University, Ivanovo, 153025 Russia

Received March 12, 2007

Abstract—Direct calorimetric data were used to calculate the heats of formation for mixed-ligand complexes
MNtaEn, where Nta³ is nitrilotriacetato ion, En is ethylenediamine, and M²⁺ = Ni²⁺, Zn²⁺, Cu²⁺, or Cd²⁺, in
aqueous solution at 298.15 K and ionic strength I = 0.5 (NaNO₃). The complete set of thermodynamic param-
eters of reaction was calculated for mixed-ligand complex formation and comproportionation.

DOI: 10.1134/S0036023608070309

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