NMR analysis of benzotrifluoride partially oriented in a nematic phase

The NMR spectrum of benzotrifluoride dissolved in the nematic phase of n-(p-ethoxybenzylidene)-p'-n-butylaniline has been analysed, and the structure of the proton and fluorine skeleton has been determined. The height of the hindering potential to trifluoromethyl rotation cannot be measured. Due to the low accuracy of the determined F? F distance, no precise information about the anisotropy of the indirect coupling can be given.