1,4-二取代的2,6-二氟苯甲醇化合物具有式（I），其中R为未取代的或至少一个具有1-15个碳原子的卤素取代的烷基或烯基， 而在这些残基中，一个或多个CH 2基团可以独立地被-O - ， - S-型，（α）或β，-CO - ， - CO-O - ，-O-CO键取代。 - 或-O-CO-O-，使得O原子彼此不直接相关; A 1和A 2彼此独立地为：（a）反式-1,4-亚环己基残基，其中一个或多个不相邻的CH 2基团也可以被-O-和/或-S-代替; （b）1,4-亚苯基残基，其中一个或两个CH基团也可以被N取代; （C）选自1,4-亚环己烯组成的组中的残基，1,4-双环（2,2,2）-octylène，pipéridin'1,4二基，naphtalin'2,6二基，décahydronaphtalin- （a）和（b）可被CN取代或被氟取代的单或双取代; Z1和Z2彼此独立地为-CO-O - ， - O-CO - ， - CH2O - ， - OCH2 - ， - CH2CH2 - ， - CH = CH-，-C≡C-或键 单; m和n彼此独立地为0,1,2或3，（m + n）为1,2或3; 和X具有R的符号的一个或一个是F，Cl，-CF 3，OCF3-，-OCF2H，-OC2F5，-CN或-NCS，条件是存在于分子中Z1和Z2的残基的至少一个为 - CO-O-，-O-CO-，-CH 2 O-，-OCH 2 - ，-CH 2 CH 2，-CH = CH-或-C = C-和/或包含在残基A1和A2中的至少一个 分子代表基团（PSI）或（△）中的一个，和/或n为1或2，而在情况下 - （Z2-A2）n是基团（ε）中，X是F，Cl ，-CF 3，-OCF 3，-OCF 2 H，-OC 2 F 5，-CN或-NCS。 这些化合物可用作液晶介质的组分。

Compounds of 2,6-disubstituted 1,4-difluorobenzol have the formula (I), wherein R is an alkyl residue or alkenyl unsubstituted or at least simple substitution by halogen, having 1 to 15 carbon atoms, whereas these residues in one or more CH2 groups may independently be substituted with -O-, -S-, links types (alpha) or (beta) of -CO-, -CO-O-, -O-CO - or -O-CO-O- in such a way that O atoms are not directly bonded to each other; A1 and A2 independently of one another: (a) trans-1,4-cyclohexylene residue, wherein one or more non-adjacent CH2 groups may also be replaced by -O- and / or -S-; (B) a 1,4-phenylene residue, wherein one or two CH groups can also be replaced by N; (C) a residue selected from the group consisting of 1,4-cyclohexenylene, 1,4-bicyclo (2,2,2) -octylène, pipéridin'1,4-diyl, naphtalin'2,6-diyl, décahydronaphtalin- 2,6-diyl and 1,2,3,4-tétrahydronaphtalin-2,6diyl, whereas the residues (a) and (b) may be replaced by CN or substituted simple or double by fluorine; Z1 and Z2 independently of one another -CO-O-, -O-CO-, -CH2O-, -OCH2-, -CH2CH2-, -CH = CH-, -C = C- or a bond simple; m and n are equal to 0, 1, 2 or 3 independently of one another, (m + n) being equal to 1, 2 or 3; and X has one of the ratings of R or is F, Cl, -CF3, OCF3-, -OCF2H, -OC2F5, -CN or -NCS, provided that at least one of Z1 and Z2 residues contained in the molecule represents - CO-O-, -O-CO-, -CH2-O-, -OCH2-, -CH2CH2-, -CH = CH- or -C = C- and / or at least one of residues A1 and A2 contained in the molecule represents one of groups (psi) or (delta), and / or n is 1 or 2, whereas in the case where - (Z2-A2) n is the group (epsilon), X is F, Cl , -CF3, -OCF3, -OCF2H, -OC2F5, -CN or -NCS. These compounds are useful as liquid crystal media components.