Abstract
Nuclear magnetic resonance spectra of many bornane derivatives have been studied. The signals of the three methyl groups in the bornane derivatives were assigned. Substituent effects due to various substituents upon the signal positions of the methyl groups were evaluated and discussed briefly. The effect on the signal position of a methyl group on the bridge carbon is considerably greater when a substituent is exo-oriented than when it is endo. However, and exo-substituent which involves a group possessing a powerful diamagnetic anisotropy such as a phenyl and a carbonyl group does not always give a downfield shift to a methyl signal. In such a case, considerable caution must be exercised when considering the configuration of a substituent.
