Conformational analysis of substituted 1-cycloheptene-5,6- and 1-cycloheptene-6,7-diols from ir,raman, and pmr spectra

Conclusions For a number of substituted vic-cycloheptenediols the chair conformation with a transdiequatorial orientation of hydroxyl groups is suggested by the data of PMR in CDCl₃. The data of IR and Raman spectra of dilute solutions of these compounds in CCl₄, indicate the possibility of multiple conformations due to the different orientation of OH groups forming intramolecular hydrogen bonds or, depending on the nature of substitution, in twist boat forms.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 1980–1984, September, 1987.The authors wish to thank A. V, Il'yasov for discussing the work.