Patent ID: 7399505

Claim:
A compound of formula (I) in which M 1 is —CO—O—, —O—CO—, —CH 2 —O—, —O—CH 2 —, —CF 2 —O—, —O—CF 2 —, —CH═CH—, —CF═CF—, —C≡C—, —CH 2 —CH 2 —CO—O—, —O—CO—CH 2 —CH 2 —, —CH 2 —CH 2 —, —CF 2 —CF 2 —, —(CH 2 ) 4 —, —OC(═O)CF═CF— or a single bond, A 1 is 1,4-phenylene in which one or two hydrogen atoms may be replaced by F, Cl, CN and/or OCF 3 , or three hydrogen atoms may be replaced by fluorine, 1,4-cyclohexylene in which one or two hydrogen atoms may be replaced by CH 3 and/or F, 1-cyclohexene-1,4-diyl in which one hydrogen atom may be replaced by CH 3 or F, pyrimidine-2,5-diyl, pyridine-2,5-diyl or 1,3-dioxane-2,5-diyl, R 5 is a) H, b) F, c) a straight-chain or branched alkyl radical having 1 to 16 carbon atoms or a straight-chain or branched alkenyl radical having 2 to 16 carbon atoms, in which c1) one or more nonadjacent and nonterminal CH 2 groups may be replaced by —O—, —C(═O)O—, —O—C(═O)—, —O—C(═O)—O—, —C(═O)— or —Si(CH 3 ) 2 —, and/or c2) one CH 2 group may be replaced by —C≡C—, cyclopropane-1,2-diyl, cyclobutane-1,3-diyl, cyclohexane-1,4-diyl or phenylene-1,4-diyl, and/or c3) one or more hydrogen atoms may be replaced by F and/or Cl, G 1 -G 2 is CH 2 CH 2 , CH═CH, CF 2 CF 2 , CF═CF, CF═CH, or CH═CF, X 1 , X 2 , X 3 , X 4 , X 5 are, each independently, H or F, and R 1 is c) a straight-chain or branched alkyl radical having 1 to 16 carbon atoms or a straight-chain or branched alkenyl radical having 2 to 16 carbon atoms, in which c1) one or more nonadjacent and nonterminal CH 2 groups may be replaced by —O—, —C(═O)O—, —O—C(═O)—, —O—C(═O)—O—, —C(═O)— or —Si(CH 3 ) 2 —, and/or c2) one CH 2 group may be replaced by —C≡C—, cyclopropane-1,2-diyl, cyclobutane-1,3-diyl, cyclohexane-1,4-diyl or phenylene-1,4-diyl, and/or c3) one or more hydrogen atoms may be replaced by F and/or Cl, or d) -M 1 -A 1 -R 5 , Y 1 , Y 2 are, each independently, a) H, or b) F, wherein Y 1 or Y 2 may also have the definition c) or d), c) a straight-chain or branched alkyl radical having 1 to 16 carbon atoms or a straight-chain or branched alkenyl radical having 2 to 16 carbon atoms, in which c1) one or more nonadjacent and nonterminal CH 2 groups may be replaced by —O—, —C(═O)O—, —O—C(═O)—, —O—C(═O)—O—, —C(═O)— or —Si(CH 3 ) 2 —, and/or c2) one CH 2 group may be replaced by —C≡C—, cyclopropane-1,2-diyl, cyclobutane-1,3-diyl, cyclohexane-1,4-diyl or phenylene-1,4-diyl, and/or c3) one or more hydrogen atoms may be replaced by F and/or Cl, or d) -M 1 -A 1 -R 5 , wherein not more than one of R 1 , Y 1 and Y 2 has the definition d) -M 1 -A 1 -R 5 , with the following provisos: a) at least one of X 1 , X 2 , X 3 , X 4 , X 5 , G 1 -G 2 is or contains F, b1) when at least one of Y 1 and X 1 is F and/or G 1 -G 2 contains F, then X 2 , X 3 , X 4 can not be F, b2) when at least one of X 2 , X 3 , X 4 is F, then X 1 and Y 1 can not to be F, and G 1 -G 2 has to be CH 2 CH 2 or CH═CH, c) Y 2 and X 5 are not simultaneously F.