Disclosed is a mesomorphic compound having a .beta.-hydroxycarboxyl group as the chiral source, which is represented by the formula: ##STR1## wherein m and n are integers of from 1 to 18, X.sub.1 and X.sub.2 independently represent fluorine, chlorine or hydrogen, Y represents ##STR2## or --O--, Z represents a direct bond, ##STR3## --CH hd 2O-- or --OCH.sub.2 --, and * indicates the asymmetric carbon. The mesomorphic compound is valuable as a ferroelectric liquid crystal or an additive to a ferroelectric liquid crystal or to a compound showing the SmC phase and having no chiral group.
揭示了一种具有β-羟基羧基作为手性源的介向化合物,其
化学式表示为:##STR1## 其中m和n为1至18的整数,X₁和X₂分别代表
氟、
氯或氢,Y代表##STR2## 或--O--,Z代表直接键,##STR3## --CH hd 2O--或--OCH₂--,*表示不对称碳。该介向化合物可作为
铁电液晶或
铁电液晶的添加剂,或添加到显示SmC相且不含手性基团的化合物中。