The compound has formula (I), which is selected from the compounds having formula (II) or another compound having formula (III). . The compound having formulae (I-III), are new. In formula (I), R 1,R 2H, halogen, -CN, -SCN, -SF 5, -CF 3, -CHF 2, -CH 2F, -OCF 3, -OCHF 2 or a 1-15C alkyl group, which is replaced by CN or CF 3 or halogen, where one or multiple CH 2-groups are replaced by -o-, -S, -CH=CH, -CF=CF, -CF=CH, -CH=CF, -CO, -CO-O-, -O-CO- or -O-CO-O-, neither oxygen nor sulfur atoms are directly linked with each other; Y 1,Y 2C=CH-, or CH-CH 2-; L 1,L 2H, halogen, -CN or -CF 3, trans-1,4-cyclohexyl residue, 1,4-cyclohexenyl residue, 1,4-phenyl residue, naphthalene-2,6-diyl residue, decahydronaphthalene-2,6-diyl residue, 1,2,3,4-tetrahydronaphthalene-2,6-diyl residue, 1,4-bicyclo-[2,2,2]-octylene residue, 1,3-bicyclo-[1,1,1]-pentylene residue, spiro-[3,3]-heptane-2,6-diyl residue, where -CH2 group is replaced by -CHF- or -CF 2- in trans-1,4-cyclohexyl residue and 1,4-cyclohexenyl residue, and -CH= group is replaced by -CF=, -CCI=, -CBr=, -C(CN)=, -C(CH 3)=, -C(CH 2F)=, -C(CHF 2)=, -C(OCH 3)=, -C (OCHF 2)= and -C(OCF 3)=; Z 1,Z 2a single bond, -CH 2-CH 2-, -CF 2-CH 2-, -CH 2-CF 2-, -CF 2-CF 2-, -CH=CH-, -CF=CF-, -CF=CH-, -CH=CF-, -CtpC, -COO-, -OCO-, -CH2O-, -OCH2-, -CF2O- or -OCF2-; and n,m : 0, 1, 2 or 3. In formulae (II-III), R 1,R 2,L 1,L 2,Z 1,Z 2,n,m : same as variable groups in formula (I). Independent claims are also included for: (1) a method for the production of a liquid crystal medium, which involves mixing of one or multiple compounds of formula (I) with one or multiple another compounds; and (2) a method for the production of an electro-optical display, which involves bringing of a liquid crystal medium in between two substrates. [Image] [Image] [Image]
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