Abstract
The heat effects of 2,2′-dipyridyl (2,2′-Dipy) dissolution were measured by the calorimetric method at 298.15 K over the whole range of the mixed methanol-acetonitrile (MeOH-AN) solvent compositions. Transfer enthalpies of 2,2′-Dipy from MeOH into its mixtures with AN were calculated according to the obtained data. It was found that passing from MeOH to AN leads to a slight decrease in exothermicity of 2,2′-Dipy solvation in the solvents of compositions X AN = 0.6–1.0, which probably indicates the prevailing contribution of desolvation of the nitrogen atoms over the one of the solvation of the aromatic rings of 2,2′-Dipy molecule with decreasing the basicity of the solvent.
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Original Russian Text © I.A. Kuz’mina, T.R. Usacheva, V.A. Sharnin, K.A. Sitnikova, A. Baranski, 2013, published in Zhurnal Fizicheskoi Khimii, 2013, Vol. 87, No. 6, pp. 967–969.
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Kuz’mina, I.A., Usacheva, T.R., Sharnin, V.A. et al. Thermodynamic characteristics of 2,2′-Dipyridyl solvation in binary methanol-acetonitrile solvents. Russ. J. Phys. Chem. 87, 945–947 (2013). https://doi.org/10.1134/S0036024413060174
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DOI: https://doi.org/10.1134/S0036024413060174