Influence of the Angular Linkage on the Mesomorphic Properties of Cholesteryl Arylbenzoates

Some cholesteryl esters of arylbenzoic acids incorporating angular linkage such as –CO–, –O–, –S–, and –CH2–, have been prepared, and the transition temperatures and heats have been determined. The cholesteric-isotropic transition temperatures are likely to correlate with the angular correlation parameters of these carboxylic acid moieties. The mesomorphic phenomena are discussed in terms of the molecular structure and electronic effect of these linkages.