An investigation by N.M.R. spectroscopy of the dependence on internal motion of the orientational ordering of ethoxybenzene and 4-fluoroethoxybenzene when dissolved in a nematic solvent

Abstract

The proton N.M.R. spectra of samples of ethoxy-d ₃-benzene and 4-fluoro-ethoxy-d ₃-benzene dissolved in the nematic solvent I52 have been recorded and analysed to yield sets of dipolar coupling [Dtilde]_ij. The dipolar couplings are used together with the theoretical model of Emsley, Luckhurst and Stockley to obtain V(φ) the potential governing rotation about the O-CH₂ bond, and the dependence on φ of the orientational order parameters S _αβ.