Abstract: The axial conformer of phenylcyclohexane has been observed for the first time by using a unique but simple high-temperature cryogenic trapping technique. Thermodynamic and NMR spectral data have been obtained for this high-energy conformer, which is shown to have a perpendicular geometry. The NMR chemical shift differences between the equatorial and axial conformers are discussed in terms of their geometries and recent ...
