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Regularities in the Influence of Water-Organic Solvents on the Thermodynamics of Complex Formation: II.1 Changes in Enthalpy and Entropy of Formation of Ammonia and Carboxylate Complexes

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Abstract

The role of enthalpy, entropy contributions to the shift of complex formation equilibria inwater-organic solvents was studied. The formation of both ammonia and carboxylate complexes of d-metalions was found to be presumably enthalpy-controlled. The role of entropy changes increases in binary solvents with a high level of supramolecular organization, and also in the case of formation of complexes of the highest orders, when the coordination of ligands is accompanied either by a complete displacement of solvent molecules from the inner coordination sphere or by a change in the complex structure. Thus found regularities can be applied for the prediction of heat effects of complex formation in water-organic solvents. In the fist communication [1] of this series we have considered the effects of the nature and composition of water-organic solvents on the stability of ammonia and carboxylate complexes of d-metal ions. This work is based on the data of our recent thermochemical works [2-22] and is dedicated to the study of the role of enthalpy and entropy contributions to the shift of the complex formation equilibria in water-organic solvents.

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  1. Ivanovo State Chemical Technological University, Ivanovo, Russia

    V. A. Sharnin

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  1. V. A. Sharnin
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Sharnin, V.A. Regularities in the Influence of Water-Organic Solvents on the Thermodynamics of Complex Formation: II.1 Changes in Enthalpy and Entropy of Formation of Ammonia and Carboxylate Complexes. Russian Journal of General Chemistry 71, 1373–1379 (2001). https://doi.org/10.1023/A:1013949801938

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