The thermodynamic characteristics of complex formation between Ni2+ ions and D,L-threonine in aqueous solution |
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| Authors: | G. G. Gorboletova L. A. Kochergina |
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| Affiliation: | (1) Ivanovo State University of Chemical Technology, Ivanovo, Russia |
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| Abstract: | The heat effects of interaction between solutions of D,L-threonine and Ni(NO3)2 were measured by direct calorimetry at 298.15 K and ionic strength values of from 0.5 to 1.5 (KNO3). The heat effects of formation of the NiL+, NiL2, and NiL 3 ? complexes were calculated. The influence of background electrolyte concentration on the heats of complex formation in the Ni2+-D,L-threonine system was studied. The standard heat effects of formation of Ni2+ complexes with D,L-threonine were obtained by extrapolation to zero ionic strength. The standard enthalpies of formation of NiL+, NiL2, and NiL 3 ? in aqueous solution were calculated. |
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