Abstract:
Polymerisable optically active compounds have the general formula: ##STR1## where: W.sup.1 denotes a polymerisable residue,S.sup.1 denotes a spacer unit,Y.sup.1 denotes a single bond, or one of the groups --O--, --COO--, --OOC--, --OCOO--, --S--, --CONH-- or --NHCO--,M denotes a divalent mesogenic group, andR.sup.1 and R.sup.2 denote straight chain, branched or cyclic alkyl groups with up to 8 carbon atom.
Abstract:
Compounds of the general formula ##STR1## wherein R.sup.1 represents vinyl or straight-chain alkenyl with 3 to 7 carbon atoms,the manufacture of such compounds, liquid crystalline mixtures which contain such compounds as well as the use of such compounds for electro-optical purposes.
Abstract:
The present invention provides compounds of the general formula: ##STR1## wherein R is an alkyl group with 1 to 12 carbon atoms or a group of the formula ##STR2## Ring A.sup.1 is 1,4-phenylene, which is unsubstituted or substituted with fluorine, pyridine-2,5-diyl or pyrimidine-2,5-diyl;Ring A.sup.2 is trans-1,4-cyclohexylene or trans-1,3-dioxane-2,5-diyl;R.sup.1 is an alkyl, alkenyl or alkoxyalkyl group with 1 to 12 and, respectively, 2 to 12 carbon atoms;X.sup.1 is fluorine, chlorine, bromine, trifluoromethyl, trifluoromethoxy or difluoromethoxy; andX.sup.2, X.sup.3 each independently are hydrogen or fluorine.The invention is also concerned with liquid crystal mixtures which contain these compounds and with the use of these compounds and mixtures for electro-optical purposes.
Abstract:
Compounds of the formula ##STR1## wherein Z.sup.1 denotes a single covalent bond or --CH.sub.2 Ch.sub.2 --; ring A.sup.1 represents 1,4-phenylene, pyrimidine-2,5-diyl, pyridine-2,5-diyl or, when Z.sup.1 stands for --CH.sub.2 CH.sub.2 --, also trans-1,4-cyclohexylene; X.sup.1 stands for fluorine or chlorine; X.sup.2 signifies fluorine, chlorine or hydrogen, with the proviso that X.sup.2 only signifies hydrogen when X.sup.1 is chlorine or when ring A.sup.1 signifies pyridine-2,5-diyl and Z.sup.1 signifies --CH.sub.2 CH.sub.2 --; and R.sup.1 signifies 1E-alkenyl with 2 to 12 carbon atoms,their manufacture, liquid crystalline mixtures which contain these compounds and their use for electro-optical purposes.
Abstract:
Compounds of formula ##STR1## wherein Z is a single covalent bond or --CH.sub.2 CH.sub.2 --, and R.sup.1 is 1E-alkenyl with 2-12 carbon atoms, liquid crystalline mixtures containing them and their use for electro-optical purposes.
Abstract:
Liquid crystalline compounds having two dioxane rings, the dipole moments of which are unidirectional. These are compounds of the general formula ##STR1## wherein A and B each independently is cyclic or acyclic hydrophobic residues; andn is 0, 1 or 2.as well as liquid crystalline mixtures which contain such compounds and the use of such compounds and, respectively, mixtures for electro-optical display devices.
Abstract:
Compounds of the formula ##STR1## wherein X.sup.1 denotes fluorine or chlorine and X.sup.2 denotes hydrogen, fluorine or chlorine; R.sup.1 is 3E-alkenyl, 4-alkenyl, 2E-alkenyloxy or 3-alkenyloxy; n stands for the number 0 or 1; one of the groups Y.sup.1 and Y.sup.2 is a single covalent bond, --COO--, --OOC--, --CH.sub.2 CH.sub.2 --, --CH.sub.2 O-- or --OCH.sub.2 -- and the other of the groups Y.sup.1 and Y.sup.2 is a single covalent bond; and rings A.sup.1 and A.sup.2 each individually are substituted or unsubstituted trans-1,4-cyclohexylene, in which optionally 2 non-adjacent CH.sub.2 groups are replaced by oxygen, or substituted or unsubstituted 1,4-phenylene, in which optionally 1 CH group or 2 CH groups is/are replaced by nitrogen; with the proviso that X.sup.2 denotes fluorine or chlorine and/or Y.sup.1 or Y.sup.2 denotes --CH.sub.2 O-- or --OCH.sub.2 -- when simultaneously X.sup.1 is fluorine and R.sup.1 is 3E-alkenyl,and their use for liquid crystalline mixtures and electro-optical purposes.
Abstract:
Compounds of the formula ##STR1## wherein X.sup.1 denotes fluorine or chlorine and X.sup.2 denotes hydrogen, fluorine or chlorine; R.sup.1 is 3E-alkenyl, 4-alkenyl, 2E-alkenyloxy or 3-alkenyloxy; n stands for the number 0 or 1; one of the groups Y.sup.1 and Y.sup.2 is a single covalent bond, --COO--, --OOC--, --CH.sub.2 CH.sub.2 --, --CH.sub.2 O-- or --OCH.sub.2 -- and the other of the groups Y.sup.1 and Y.sup.2 is a single covalent bond; and rings A.sup.1 and A.sup.2 each individually are substituted or unsubstituted trans-1,4-cyclohexylene, in which optionally 2 non-adjacent CH.sub.2 groups are replaced by oxygen, or substituted or unsubstituted 1,4-phenylene, in which optionally 1 CH group or 2 CH groups is/are replaced by nitrogen; with the proviso that X.sup.2 denotes fluorine or chlorine and/or Y.sup.1 or Y.sup.2 denotes --CH.sub.2 O-- or --OCH.sub.2 -- when simultaneously X.sup.1 is fluorine and R.sup.1 is 3E-alkenyl,and their use for liquid crystalline mixtures and electro-optical purposes.
Abstract:
Compounds of the formula ##STR1## wherein X.sup.1 represents fluorine or chlorine; X.sup.2 denotes hydrogen, fluorine or chlorine; and R.sup.1 signifies an alkyl group in which optionally a >CH--CH C.dbd.C
Abstract:
A compound of the formula ##STR1## wherein Z represents a single covalent bond or --CH.sub.2 --CH.sub.2 --; R.sup.1 denotes alkyl or 2-alkenyl andR.sup.2 is 1E-alkenyl, 3E-alkenyl, 4-alkenyl, (2-alkenyl)oxymethyl or, when R.sup.1 denotes 2-alkenyl and/or Z represents --CH.sub.2 --CH.sub.2 --, R.sup.2 also is alkyl, cyano or alkoxymethyl,as well as the manufacture of the compounds of formula I. Also disclosed is the use of the compounds in liquid crystalline mixtures and for electro-optical purposes.