Novel compounds having a general formula:
where m, n are 0 or 1, R1 represents hydrogen, alkyl, alkoxy, alkoxy substituted alkyl, alkanoyl, alkanoyloxy, alkoxycarbonyl or alkoxycarbonyloxy,
represent cyclic groups, each of X, Y, Z is hydrogen or fluorine, at least one being fluorine, B is F, CL or CF3. Preferred compounds have a formula
where R1 is Ci-12 alkyl or alkoxy, B is fluorine.
The compounds may be used as components of liquid crystal compositions, having a low viscosity and high clearing point.
新型化合物的通式为:其中 m、n 为 0 或 1,R1 代表氢、烷基、烷氧基、烷氧基取代的烷基、烷酰基、烷酰氧基、烷氧羰基或烷氧羰氧基,代表环状基团,X、Y、Z 中的每一个均为氢或
氟,其中至少一个为
氟,B 为 F、CL 或
CF3。 优选化合物的通式为:其中 R1 为 Ci-12 烷基或烷氧基,B 为
氟。 这些化合物可用作液晶组合物的成分,具有低粘度和高清澈点。