Heterocyclically substituted ethanes and their use in liquid crystal materials and devices

Abstract

A heterocyclically substituted ethane having a formula: R.sub.1 --Cy--CH.sub.2.CH.sub.2 --A--R.sub.2 Formula I wherein A represents a heterocyclic ring selected from a trans 2,5 disubstituted 1,3 dioxan ring and a 2,5 disubstituted 1,3-pyrimidine ring; R.sub.1 represents an alkyl group having from 1 to 15 carbon atoms and R.sub.2 represents a group selected from hydrogen, alkyl having from 1 to 15 carbon atoms and alkoxy having from 1 to 15 carbon atoms provided that where A is a trans 2,5 disubstituted 1,3 dioxan ring R.sub.2 is alkyl; and Cy represents a trans-1,4 disubstituted cyclohexane ring.

Dependencies are inferred from the claim text.