Complete 13C NMR Spectra of the Axial Forms of Methyl- Ethyl- and Isopropylcyclohexane

Article abstract of DOI:10.1002/mrc.1260250113

Low temperature 13C NMR spectral data have been obtained for equatorial and axial methyl- ethyl- and isopropylcyclohexane using a high-temperature cryogenic trapping technique. 13C chemical shift differences between major and minor conformations of each compound are discussed in terms of chemical shift theories.A convenient synthesys of deuteriated dichlorofluoro- and difluorochloromethane, which are excellent low-temperature NMR solvent, is also presented. - KEY WORDS Low temperature 13C NMR; methylcyclohexane; ethylcyclohexane; isopropylcyclohexane; axial and equatorial conformers.