x ray investigations excluded the layered structure (see the
Supporting Information). In both nematic phases, weak
diffused signals corresponding nearly to a half and full
molecular length were detected and the positional correlation
length determined from the width of the signal was approximately
one molecular length in the N* phase. The signal that
is related to a full molecular length became slightly narrower
in the lower-temperature nematic phase, but the correlation
length (ca. 1.5 molecular length) remained typical for the
liquid phase.
To identify