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Enthalpy characteristics of dilute solutions of amides in acetonitrile

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Abstract

The enthalpy of mixing of formamide,N-methylformamide,N,N-dimethylformamide, and hexamethylphosphoric triamide with MeCN was measured in the 283–328 K range. The enthalpic coefficients of the binary and ternary interactions between the amide molecules are calculated within the framework of the McMillan-Mayer theory. The contributions to the enthalpy of dissolution due to cavity formation in the solvent (Δcav H 0) and due to solute-solvent interaction (Δint H 0) were determined. The enthalpies of specific and nonspecific solvation of amides in MeCN were calculated. The main contribution to the enthalpy of solvation of formamide andN-methylformamide is from specific interactions, while forN,N-dimethylformamide and hexamethylphosphoric triamide it is from nonspecific interactions. The values obtained are compared with those for solutions of the amides mentioned in water and methanol.

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Authors and Affiliations

  1. Institute of the Chemistry of Non-Aqueous Solutions, Russian Academy of Sciences, 1 ul. Akademicheskaya, 153045, Ivanovo, Russian Federation

    M. V. Kulikov & A. M. Kolker

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  1. M. V. Kulikov
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  2. A. M. Kolker
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Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 1730–1735, October, 1993.

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Kulikov, M.V., Kolker, A.M. Enthalpy characteristics of dilute solutions of amides in acetonitrile. Russ Chem Bull 42, 1652–1657 (1993). https://doi.org/10.1007/BF00697033

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