It is now very well established that for a proper understanding and interpretation of several physical properties of liquid crystalline phases, a knowledge of the molecular structure in the crystalline state is very useful, as the molecular conformation in the crystalline state predetermines the molecular organisation inthe mesomorphic state. Also, it is believed that the stabilisation of liquid crystalline phase and hence the micro variations in the physical properties depend strongly on the long side chains and are essentially independent of the central rigid core. In view of this, we communicate the preliminary crystallogrphic data for some liquid crystalline materials, the detailed structure of which has been taken up.