Thermochemical Study of Complex Formation Reactions
between Cadmium(II) and Gllycylglycine in Water Solution

L. A. Kochergina and A. V. Emel’yanov

Scientific Research Institute for Thermodynamics and Kinetics of Chemical Processes, Ivanovo State University of Chemical
Technology, Ivanovo, Russia

e-mail: kochergina@isuct.ru

Received February 2, 2012

Abstract—The heats of reactions between a gllycylglycine solution and a cadmium(II) nitrate solution at var-
ious pH values and [metal] : [ligand] ratios were measured by direct calorimetry. Temperature was varied from
288.15 to 308.15 K; KNO₃ was used as a background electrolyte. The heats of dilution of cadmium nitrate solu-
tion in background electrolyte solutions were also measured in order to make the proper corrections. The stan-
dard thermodynamic parameters of complex formation between the peptide and cadmium(II) ion in water solu-
tion were calculated.

DOI: 10.1134/S0036023613050112

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