Conformational effects in compounds with six-membered rings—VIII
作者:F.G. Riddell、M.J.T. Robinson
DOI:10.1016/s0040-4020(01)98146-3
日期:1971.1
preferred orientations of ethyl and isopropyl groups in 1-alkyl-3,3-diphenylallenes and in 2-alkyl-1,3-dioxanes and -dioxolanes have been determined from the temperature dependence of the spin-spin coupling constants for appropriate vicinal protons. In the allenes a methyl group rather than a hydrogen atom eclipses a double bond but in the cyclic acetals skew interactions between methyl groups and oxygen