Synthesis and Liquid Crystalline Properties of 1 -(trans-4-Alkylcyclohexylethyl)-4-Alkyl- and -4-Alkoxy-Benzenes, Their Ketone Precursors, and Some Lateral Fluoro-Derivatives

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Abstract
The preparation of some 1-(trans-4-alkylcyclohexylethyl)-4-alkyl- and -4-alkoxy-benzenes, their methylenecarbonyl linked analogues and their laterally fluoro- and bromosubstituted derivatives is reported. Twenty-four inter-related compounds have been prepared and the trends in their transition temperatures are discussed. Both the melting points and clearing points for these compounds are relatively low and, in general, S B and S A phases predominate. The suitability of these compounds as additives to S C materials has been assessed using two S C hosts.