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Temperature dependence of associative equilibria of DMSO according to raman scattering spectra

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Abstract

Raman scattering spectra of dimethyl sulfoxide (DMSO) are studied in the area of the line corresponding to symmetric CSC stretching vibrations of the molecule. It is established that this line is composed of a low-frequency component that corresponds to the vibrations of monomeric molecules and a high-frequency component that corresponds to the vibrations of DMSO dimers. Values of self-association equilibrium constants K a varying in range from 0.20 (23°C) to 0.081 (100°C) are obtained. Since the intensities of the respective components of the line contour are proportional to the compound’s concentrations, the enthalpy of DMSO self-association (ΔH = −11.7 ± 0.9 kJ/mol) is determined from the temperature dependences.

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Authors and Affiliations

  1. Interdepartmental Branch of Electrochemical Energetics, National Academy of Sciences of Ukraine, Kyiv, 03142, Ukraine

    S. A. Kirillov & M. I. Gorobets

  2. Institute of Problems of Sorption and Endoecology, National Academy of Sciences of Ukraine, Kyiv, 03164, Ukraine

    S. A. Kirillov

  3. Analytical Center for Collective Use, Amirkhanov Institute of Physics, Dagestan Scientific Center, Russian Academy of Sciences, Makhachkala, 367003, Russia

    M. M. Gafurov, K. Sh. Rabadanov & M. B. Ataev

Authors
  1. S. A. Kirillov
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  2. M. I. Gorobets
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  3. M. M. Gafurov
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  4. K. Sh. Rabadanov
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  5. M. B. Ataev
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Corresponding author

Correspondence to S. A. Kirillov.

Additional information

Original Russian Text © S.A. Kirillov, M.I. Gorobets, M.M. Gafurov, K.Sh. Rabadanov, M.B. Ataev, 2014, published in Zhurnal Fizicheskoi Khimii, 2014, Vol. 88, No. 1, pp. 140–142.

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Kirillov, S.A., Gorobets, M.I., Gafurov, M.M. et al. Temperature dependence of associative equilibria of DMSO according to raman scattering spectra. Russ. J. Phys. Chem. 88, 175–177 (2014). https://doi.org/10.1134/S0036024414010130

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  • DOI: https://doi.org/10.1134/S0036024414010130

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