Abstract: | Different isotopic modifications of deuterated products of 1-t-butlyl-4-methoxycarbonyl cyclohexene (d4-3,3,6,6), cis- and trans-3-methyl-4-cyanocyclohexene (d3-3,6,6), cis- and trans-3-methyl-4-cyanocyclohexene (d3,6,6), cis- and trans-3-t-butyl-4-methoxycarbonylcyclohexene (d3,-3,6,6) are shown by nuclear magnetic resonance spectral analysis. By comparison of 3J and 4J coupling constants of model molecules and molecules with large gauche interactions, we obtain proof that the latter are in a chair conformation with moderate cycle deformations. |