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Spectra and conformations of some compounds with unsaturated seven-membered rings

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

Conclusions

  1. 1.

    In the IR and Raman spectra of 3,3,6-trimethyl-6α-hydroxy-7β-chlorocyclohept-1-en-5-one when the phase and other conditions are varied there are indications of a conformational equilibrium involving at least three molecular forms.

  2. 2.

    On the basis of this information as well as PMR spectra and examination of models it follows that in the liquid state the “chair” and “twist boat” forms occur. Similar results have also been obtained for 3,6-trimethyl-6α-hydroxy-7β-methoxycyclohept-1-en-5-one, in which hindered rotation about the C-OMe axis is also observed.

  3. 3.

    Analysis of the spectra and models of 3,3,6-trimethyl-6,7-epoxycyclohept-1-en-5β-ol and 3,3,6-trimethyl-6,7-epoxycyclohepten-5-one molecules has provided a conclusion about their possible conformations.

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Literature cited

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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

    R. R. Shagidullin Jr., R. R. Shagidullin, K. M. Enikeev, A. N. Karaseva & G. A. Bakaleinik

Authors
  1. R. R. Shagidullin Jr.
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  2. R. R. Shagidullin
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  3. K. M. Enikeev
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  4. A. N. Karaseva
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  5. G. A. Bakaleinik
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Additional information

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 7, pp. 1555–1560, July, 1988.

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Shagidullin, R.R., Shagidullin, R.R., Enikeev, K.M. et al. Spectra and conformations of some compounds with unsaturated seven-membered rings. Russ Chem Bull 37, 1374–1378 (1988). https://doi.org/10.1007/BF00962743

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  • DOI: https://doi.org/10.1007/BF00962743

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