Thermal stabilities, packing coefficients and molecular packings in a series of homologous liquid crystals

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Abstract
A systematic study of the molecular and crystalline structures of the mesogenic compounds is of considerable interest in order to interpret a number of basic physical properties of liquid crystals. In view of this an a priori determination of the molecular packings have been made for the liquid crystalline materials p-p-ethoxyphenylazo phenyl heptanoate (P1) and undecylenate (P1 and P21/c for the two modifications) based on the earlier results of detailed molecular structure data for the similar molecules, p-p-ethoxyphenylazo phenyl valerate (P1) and hexanoate (P21/c) and the model approach of Kitaigorodsky. The estimated packing coefficients correlate well with thermal stabilities in the homologous series

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