Cyano-alicyclic esters in liquid crystal compositions

Abstract

Abstract Compounds suitable for use as constituents of ferroelectric smectic liquid crystal compositions, which are ester of formula (I), where R 2 and R 3 together represent the residue of an alicyclic hydrocarbon ring system where *C is an asymmetric carbon atom and X is a chain of up to three linked aromatic or alicyclic six-membered organic cyclic groups, laterally and/or terminally substituted. Preferred compounds have a formula (II), where R 1 is alkyl or alkoxy, A, B, and D are phenyl, fluoro or chloro substituted phenyl or cyclohexyl, n is 0 or 1, Y is a bond or CH 2 CH 2 if n is 0, or a bond CH 2 CH 2 COO or COO if n is 1. Preferred groups C(CN)R 2 R 3 are formula (III) and (IV). ##STR1##

Inventors

• 👤 George W. Gray
• 👤 Kenneth J. Toyne
• 👤 David Lacey
• 👤 David Holmes
• 👤 Richard M. Scroston

Bibliographic Details