SYNTHESIS AND MESOMORPHIC PROPERTIES OF THE HOMOLOGOUS SERIES OF TRANS-1,4-CYCLOHEXANE-DI-4'-N-ALKOXYBENZENES

The homologous series of trans-1,4-cyclohexane-di-4- prime n-alkoxybenzoates in which the alkyl group is C//1-C//8, C//1//0, C//1//2, C//1//4 and C//1//6 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 properties. Relationships between thermal and x-ray data and structures are discussed.