  NMR measurements on a selectively deuteriated liquid crystal dimer CB-C9-CB
exhibiting two nematic phases show that the molecules in the lower temperature
nematic phase, Nx, experience a chiral environment and are ordered about a
unique direction. The results are contrasted with previous reports that
proposed a twist-bend spatial variation of the director. A structural model is
proposed wherein the molecules show organization into highly correlated
assemblies of opposite chirality.
