The compound under study is a double mesogen in which two rigid p-terphenyl
-based units are laterally connected by a carbonate linker. The cystal stru
cture has been determined and reported. Here some crystallogra-phic calcula
tions have been done to correlate the structure property relationship of th
e compound. The six rings are found to be in different conformations. No tw
o rings are coplanar. The four decycloxy side chains are maximally extended
. Molecules of the compound are packed along the crystallographic a-axis. T
he molecular arrangement is a precursor of smectic phase. Texture study has
been performed and supercooling region was found. The layer spacing and in
termolecular distance during the entire mesomorphic range have been studied
from X-ray diffraction technique.