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Determination of the effect of the medium on the thermodynamic parameters of the conformational transformations of 3-substituted 2,4-dithia-3,5-dihydro-1H-cycloocta[d,e]naphthalenes by double fitting of exchange-broadened PMR spectra

  • Physical Chemistry
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Bulletin of the Academy of Sciences of the USSR, Division of chemical science Aims and scope

Abstract

The thermodynamic parameters of the conformational equilibrium for 3-substituted 2,4-dithia-3,5-dihydro-IH-cycloocta[d,e] naphthalenes in various solvents were obtained by the PMR method with temperature variation. The “double fitting” procedure makes it possible to eliminate the systematic error due to the effect of temperature on the spectral parameters of each of the forms. Here the linear temperature dependence of the nonequivalence in the chemical shifts of the AB quadruplets leads to good agreement between the theoretical and experimental line shapes over the whole temperature range of the investigations. The effect of the medium on the enthalpy of the equilibrium can be explained in terms of the reactive field model.

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Authors and Affiliations

  1. A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan' Branch, Academy of Sciences of the USSR, USSR

    Sh. K. Latypov, V. V. Klochkov, A. V. Il'yasov & A. V. Aganov

  2. Kazan' State University, USSR

    Sh. K. Latypov, V. V. Klochkov, A. V. Il'yasov & A. V. Aganov

Authors
  1. Sh. K. Latypov
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  2. V. V. Klochkov
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  3. A. V. Il'yasov
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  4. A. V. Aganov
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Additional information

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1750–1755, August, 1990.

The authors thank E. N. Klimovitskii and D. Yu. Strel'nik for providing compounds (I–III).

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Latypov, S.K., Klochkov, V.V., Il'yasov, A.V. et al. Determination of the effect of the medium on the thermodynamic parameters of the conformational transformations of 3-substituted 2,4-dithia-3,5-dihydro-1H-cycloocta[d,e]naphthalenes by double fitting of exchange-broadened PMR spectra. Russ Chem Bull 39, 1586–1590 (1990). https://doi.org/10.1007/BF00961483

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  • DOI: https://doi.org/10.1007/BF00961483

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