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Rotational isomerism and vibrational spectra of n-PrSPCl2 and i-PrSPCl2 molecules

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

Conclusions

  1. 1.

    In the molecules of n-PrSPCl2, internal rotation is observed around P-S, S-C, and C-C bonds, leading to a dynamic equilibrium of at least four conformers of the gauche and trans types.

  2. 2.

    In i-PrSPCl2 in the liquid state and in solutions, internal rotation takes place around P-S and S-C bonds. A single conformer is realized in the crystal, in which the S-C bond has the trans orientation relative to the unshared electron pair on the P atom, and the methyl proton has the gauche orientation relative to the P-S bond.

  3. 3.

    In the series of thiophosphites RSPCl2 (R=Me, Et, n-Pr, and i-Pr), variation of the length and branching of the alkyl radical attached to the S atom does not lead to any qualitative changes in the energetics of internal rotation around the P-S bond: Conformations with the trans orientation of the S-C bond relative to the unshared electron pair on the P atom are energetically favored in all members of the series.

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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, Russia

    E. A. Filippova, S. A. Katsyuba, V. N. Shegeda, R. R. Shagidullin & A. G. Trusenev

Authors
  1. E. A. Filippova
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  2. S. A. Katsyuba
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  3. V. N. Shegeda
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  4. R. R. Shagidullin
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  5. A. G. Trusenev
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Additional information

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 7, pp. 1531–1537, July, 1989.

The authors wish to express their appreciation to O. G. Sinyashin for furnishing the compound n-PrSPCl2.

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Filippova, E.A., Katsyuba, S.A., Shegeda, V.N. et al. Rotational isomerism and vibrational spectra of n-PrSPCl2 and i-PrSPCl2 molecules. Russ Chem Bull 38, 1399–1405 (1989). https://doi.org/10.1007/BF00978426

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  • DOI: https://doi.org/10.1007/BF00978426

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