Conclusions
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1.
The assignment of the bands and the lines in the vibrational (IR, Raman) spectra of vinyldichlorophosphine oxide (VDCPO) was refined by normal-coordinate analysis.
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2.
The conformational nonuniformity of VDCPO was established on the basis of an analysis of the dependence of the spectra on the phase state, the temperature, the polarity of the solvent, and the concentration of the solutions. In the liquid and in the gas VDCPO exists in an equilibrium between two forms, of which at least one is unsymmetrical. In the more stable and less polar conformer (which remains in the crystal) the C=C and P=0 double bond are close to eclipsing, while in the other they are opened up.
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3.
In addition to the conformational nonuniformity, the signs of intermolecular effects appear in the spectra of the liquid and the solutions.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2729–2736, December, 1987.
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Chernova, A.V., Doroshkina, G.M., Katsyuba, S.A. et al. Vibrational spectra and conformations of vinyldichlorophosphine oxide molecules. Russ Chem Bull 36, 2530–2536 (1987). https://doi.org/10.1007/BF00957227
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DOI: https://doi.org/10.1007/BF00957227