Disubstituted ethanes having a formula ##STR1## wherein R is alkyl, X is selected from hydrogen, ##STR2## wherein each R.sub.1 is selected from H, alkyl, alkoxy, halo and cyano and each of Q.sub.1, Q.sub.2, Q.sub.3 and Q.sub.4 is independently selected from H and F are useful as components of liquid crystal materials for electro-optical displays and compounds useful in the production of such components.
具有公式##STR1##的二取代
乙烷,其中R为烷基,X选择自氢,##STR2##其中每个R.sub.1选择自H,烷基,烷氧基,卤素和
氰基,每个Q.sub.1,Q.sub.2,Q.sub.3和Q.sub.4都是独立选择自H和F,可用作液晶材料的组分,用于电光显示和用于生产此类组分的化合物。