No abstract

The first group of fully characterised mesogenic (€,€)-I ,4-diarylbuta-I ,3-dienes, substituted in the para-position of one aryl ring by an alkoxy-group and in the para-position of the other aryl group by a cyano-or halogeno-group has been prepared by a Wadsworth-Emmons procedure; their physical properties of high birefringence and low viscosity i n combination make them particularly suitable for use in liquid crystal display devices when mixed with known liquid crystalline materials.

A group of (€,€)-1.4-diarylbuta-l,3-dienes, substituted in the para-position of one aryl ring by an alkoxy-group and in the para-position of the other aryl group by a cyano-or halogeno-group have been synthesised. The compounds are mesogenic and their physical properties make them suitable for liquid crystal display devices when mixed with known liquid crystal materials.Paper 2/065 1 8E

The cyclohex-2-en-1-one unit flanked by one or more aryl rings is shown to provide a new system which can exhibit liquid crystal properties; these new mesogens contain a chiral centre which is both adjacent to a lateral dipolar carbonyl group and is also located in the central core.