摘要:
Liquid crystalline naphthalene derivatives of the formula ##STR1## wherein ring A is 1,4-phenylene, trans-1,4-cyclohexylene or 1,4-cyclohex-1-enylene and ring system BC is 2,6-naphthylene, 3,4-dihydro-2,6-naphthylene or 1,2,3,4-tetrahydro-2,6-naphthylene, with the proviso that A is not 1,4-phenylene when BC is 2,6-naphthylene; and R.sub.1 and R.sub.2, which are identical or different, are each alkyl of up to 8 C atoms or, when the rings to which they are bonded are aromatic, also can be alkoxy, alkanoyloxy or alkoxycarbonyloxy having up to 8 C atoms in each case; or one of R.sub.1 and R.sub.2 also can be CN, halogen, CF.sub.3 or NO.sub.2 are valuable components for liquid crystalline dielectrics.
摘要:
Cyclohexylphenyl derivatives of the formula ##STR1## wherein X is --CH.sub.2 --CH.sub.2 --, --CH.sub.2 --O--, --CH.sub.2 --S--, --O--CH.sub.2 -- or --S--CH.sub.2 --; R.sub.1 is alkyl of up to 8 carbon atoms; R.sub.2 is alkyl or alkoxy each of up to 8 carbon atoms, fluorine, chlorine, bromine or cyano; and R.sub.3 and R.sub.4 are both hydrogen or one is hydrogen and the other is fluorine, chlorine, bromine or cyano, with the proviso that R.sub.3 and R.sub.4 are both hydrogen when X is --CH.sub.2 --CH.sub.2 -- or R.sub.2 is fluorine, chlorine, bromine or cyano, are valuable liquid crystalline compounds.
摘要:
Liquid crystalline fluorine-containing pyrimidine compounds have the formula I ##STR1## wherein R.sup.1 and R.sup.2 are H, R, OR or OCOR, and one of them can also be CN or F, or, if A is a covalent bond, also one or both of R.sup.1 and R.sup.2 can be 4-R.sup.4 -phenyl or 4-R-cyclohexyl, wherein R.sup.4 is R, OR, cyano, f or OCOR; wherein R is an alkyl group of 1 to 12 C atoms; R.sup.3 is F or, if one of the radicals R.sup.1 or R.sup.2 is F or 4-fluorophenyl, also H; Z is 1,3-pyrimidin-2,5-diyl; and A is 1,4-phenylene, 1,4-cyclohexylene or a covalent bond.Fluorine-containing pyrimidine compounds are useful components of liquid crystal dielectrics for electro-optical display devices.
摘要翻译:液晶含氟嘧啶化合物具有式I的化合物,其中R 1和R 2是H,R,OR或OCOR,它们之一也可以是CN或F,或者如果A是共价键,也可以是一个或 R 1和R 2可以是4-R 4 - 苯基或4-R-环己基,其中R 4是R,OR,氰基,F或OCOR; 其中R是1至12个C原子的烷基; R 3为F,或者如果基团R 1或R 2中的一个为F或4-氟苯基,则为H; Z是1,3-嘧啶-2,5-二基; A是1,4-亚苯基,1,4-亚环己基或共价键。 含氟嘧啶化合物是用于电光显示装置的液晶电介质的有用组分。
摘要:
Cyclohexane derivatives of formula IR.sup.1 --(A.sup.1).sub.m --Z.sup.1 --A--Z.sup.2 --(A.sup.2).sub.n --R.sup.2 (I)wherein R.sup.1 and R.sup.2 are each H, an alkyl group which has 1-10 C atoms and in which one or two CH.sub.2 groups can also be replaced by 0 atoms, F, Cl, Br, CN or --O--COR, A.sup.1 and A.sup.2 are each 1,4-phenylene, 1,4-cyclohexylene, 1,3-dioxane-2,5-diyl, piperidine-1,4-diyl, 1,4-bicyclo(2,2,2)-octylene or pyrimidine-2,5-diyl groups which are unsubstituted or substituted by 1-4 F atoms, A is a 1,4-cyclohexylene group which is substituted in the 1-position and/or 4-position by alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy, each of which has 1-5 C atoms, F, Cl, Br and/or CN and which can also carry 1 or 2 further F, Cl or Br atoms and/or CN groups, Z.sup.1 and Z.sup.2 are each --CO--O--, --O--CO--, --CH.sub.2 CH.sub.2 --, --OCH.sub.2 --, --CH.sub.2 O-- or a single bond, R is an alkyl group which has 1-5 C atoms, m is 1 or 2 and n is 0 or 1, it being possible, where m=2, for the two groups A.sup.1 to be identical or different from one another; and the acid addition salts of those compounds which are basic, are suitable for use as components of liquid-crystal dielectrics.
摘要:
Cyclohexane derivatives of formula IR.sup.1--(A.sup.1).sub.m 13 Z.sup.1 --A--Z.sup.2 --(A.sup.2).sub.n --R.sup.2 Iwherein R.sup.1 and R.sup.2 are each H, an alkyl group which has 1-10 C atoms and in which one or two CH.sub.2 groups can also be replaced by 0 atoms, F, Cl, Br, CN or --O--COR, A.sup.1 and A.sup.2 are each 1,4-phenylene, 1,4-cyclohexylene, 1,3-dioxane-2,5-diyl, piperidine-1,4-diyl, 1,4-bicyclo(2,2,2)-octylene or pyrimidine-2,5-diyl groups which are unsubstituted or substituted by 1-4 F atoms, A is a 1,4-cyclohexylene group which is substituted in the 1-position and/or 4-position by alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy, each of which has 1-5 C atoms, F, Cl, Br and/or CN and which can also carry 1 or 2 further F, Cl or Br atoms and/or CN groups, Z.sup.1 and Z.sup.2 are each --CO--O--, --O--CO--, --CH.sub.2 CH.sub.2 --, --OCH.sub.2 --, --CH.sub.2 O-- or a single bond, R is an alkyl group which has 1-5 C atoms, m is 1 or 2 and n is 0 or 1, it being possible, where m=2, for the two groups A.sup.1 to be identical or different from one another; and the acid addition salts of those compounds which are basic,are suitable for use as components of liquid-crystal dielectrics.
摘要:
Partially hydrogenated oligo-1,4-phenylenes of the formula ##STR1## wherein n is 1 or 2, the rings A and B are identical or different and are trans-4-alkylcyclohexyl or 4-alkylcyclohex-1-enyl, and the alkyl groups in each case are of up to 10 carbon atoms, have valuable liquid crystalline properties.
摘要:
Cyclohexane derivatives of formula IR.sup.1 --(A.sup.1).sub.m --Z.sup.1 --A--Z.sup.2 --(A.sup.2).sub.n --R.sup.2 Iwherein R.sup.1 and R.sup.2 are each H, an alkyl group which has 1-10 C atoms and in which one or two CH.sub.2 groups can also be replaced by O atoms, F, CL, Br, CN or --O--COR, A.sup.1 and A.sup.2 are each 1,4-phenylene, 1,4-cyclohexylene, 1,3-dioxane-2,5-diyl, piperidine-1,4-diyl, 1,4-bicyclo(2,2,2)-octylene or pyrimidine-2,5-diyl groups which are unsubstituted or substituted by 1-4 F atoms, A is a 1,4-cyclohexylene group which is substituted in the 1-position and/or 4-position by alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy, each of which has 1-5 C atoms, F, Cl, Br and/or CN and which can also carry 1 or 2 further F, Cl or Br atoms and/or CN groups, Z.sup.1 and Z.sup.2 are each --CO--O--, --O--CO--, --CH.sub.2 CH.sub.2 --, --OCH.sub.2 --, --CH.sub.2 O-- or a single bond, R is an alkyl group which has 1-5 C atoms, m is 1 or 2 and n is 0 or 1, it being possible, where m=2, for the two groups A.sup.1 to be identical or different from one another; and the acid addition salts of those compounds which are basic,are suitable for use as components of liquid-crystal dielectrics.
摘要:
A phenylcyclohexene of the formula ##STR1## wherein n is 1 or 2, X is --H, --R, --OR, --OCOR, --OCOOR, --CF.sub.3 or --F, and when n is 1, X can also be ##STR2## R is alkyl of 1-8 C atoms and when two R groups are present they can be the same or different, has valuable liquid crystalline properties.
摘要:
Compounds of the formula ##STR1## wherein R.sub.1 and R.sub.2 are identical or different and each is alkyl or alkoxy each of up to 8 C atoms, and one or two of the substituents X are fluorine and the others are hydrogen are valuable liquid crystalline materials.
摘要:
New hydroterphenyls of formula IR.sup.1 --Cy--Cy--Ph--R.sup.2 Iwherein R.sup.1 is alkyl; R.sup.2 is H, F, Cl, Br, I, OH, CN, alkyl, --O-alkyl, --COOR.sup.3 or --O--CO--R.sup.3 ; R.sup.3 is H, alkyl, --Cy-alkyl, --Ph-alkyl, --Ph--O-alkyl, --Ph--CN or --Ph--F; Cy is 1,4-cyclohexylene; and Ph is 1,4-phenylene; can be used as dielectrics for electrooptical display elements.