Abstract
New liquid crystal compounds, (S)-(+)-[4-(methyI)-1,3-dioxolan-2-yl]phenyl-4-n-alkoxybenzoates, I, and (S)-(+)-[4-(methyl)-1,3-dioxolan-2-yl]phenyl-4-n-alkoxycinnamates, II, have been synthesized and the thermotropic liquid-crystalline behaviour investigated. The compounds did not exhibit a chiral smectic C phase. The mesophases present in these compounds are cholesteric and smectic A phases. The transition temperatures of series II are higher than those for series I.