Synthesis,Characterisation and Phase Transition Studies of 50.9 and 90.5

The synthesis, characterisation of phases of the compounds N(p-n-pentyloxy benzylidene) p-n-nonylaniline, 50.9 and N(p-n-nonyloxy benzylidene) p-n-pentylaniline, 90.5 and phase transition studies using different experimental techniques are presented. The compound 50.9 exhibits a phase sequence NAB whereas 90.5 shows a phase variant ABG. A large density jump across IN transition is observed in 50.9 similar to that observed in 50.10 compound.