Synthesis and Mesomorphic Properties of the Homologous Series of trans-1,4-Cyclohexane-di-4′-n-Alkoxybenzenes

Abstract

The homologous Series of trans-1,4-cycolhexane-di-4′-n-alkoxybenzoates in which the alkyl group is C₁-C₈, C₁₀, C₁₂, C₁₄ and C₁₆ has been prepared by esterification of trans-1,4-cyclohexanedicarbonyl chloride with 4-alkoxyphenols. Mesomorphic properties and phase transitions have been determined using polarizing hot-stage microscopy and DSC. A comparison of the data for this series with those for the analogous terephthalic acid diesters gives some insight into the effect of a cyclohexane ring on mesomorphic propertries. Relationships between thermal and x-ray data and structures are discussed.