Abstract: The present invention relates to chemical compounds containing five or more benzene rings arranged in a linear manner and two bridging units between these rings, where at least one of these units represents a —CF2O— bridge. The invention additionally relates to liquid-crystalline media and to high-frequency components comprising these media, in particular antennae, especially for the gigahertz range.

Abstract: The present invention relates to chemical compounds containing five or more benzene rings arranged in a linear manner and two bridging units between these rings, where at least one of these units represents a —CF2O— bridge. The invention additionally relates to liquid-crystalline media and to high-frequency components comprising these media, in particular antennae, especially for the gigahertz range.

Abstract: The invention relates to pyran derivatives of the formula I and to a process and intermediates for their preparation and derivatisation, and to the use thereof in liquid-crystalline media.

Abstract: The invention relates to novel dioxane derivatives of the formula R1-(A1-Z1)m-G-(Z2-A2)n-R2, in which G denotes (I) or (II), and in which R1, R2, A1, A2, Z1, Z2, m and n have the meanings indicated in claim 1, to the use thereof as component(s) of liquid-crystalline media, and to liquid-crystal and electro-optical display elements which contain the liquid-crystalline media according to the invention.

Abstract: The invention relates to tetrahydropyran derivatives of the general formula I and to processes for the preparation thereof.

Abstract: The invention relates to novel dioxane derivatives of the formula R1-(A1-Z1)mG-(Z2-A2)n-R2, in which G denotes (I) or (II), and in which R1, R2, A1, A2, Z1, Z2, m and n have the meanings indicated in claim 1, to the use thereof as component(s) of liquid-crystalline media, and to liquid-crystal and electro-optical display elements which contain the liquid-crystalline media according to the invention.

Abstract: The invention relates to liquid-crystalline compounds of the formula (I), where R11, X11, L11, Y and W are as defined in claim 1, and to the use thereof in liquid-crystalline media, to liquid-crystalline media comprising at least one compound of the formula (I) and to electro-optical displays containing a liquid-crystalline medium of this type

Abstract: The invention relates to liquid-crystalline phenol esters of the formula I in which R, A1, Z1, m, L and Y are as defined in Claim 1, to liquid-crystalline media comprising at least one phenol ester of the formula I, and to electro-optical displays containing such a liquid-crystalline medium.

Abstract: The invention relates to pyran derivatives of formula I and processes and intermediates for their preparation and derivatisation, and the use thereof in liquid-crystalline media.

Abstract: The present invention relates to a process for the preparation of a compound of the general formula R-(A1-Z-)mB—CF2O-A2-(A3)n—R???(I) in which R is alkyl, in which one or more CH2 groups may be replaced, independently of one another, by O, CF2, CH?CH, CH?CF or CF?CF, with the proviso that peroxide structures O—O and formaldehyde acetals O—CH2—O are excluded, A1 is, independently of one another, 1,4-cyclohexylene, 2,5-1,3-dioxanylene, 1,3-cyclobutylene or A2 and A3 are 1,4-phenylene, in which, independently of one another, from one to four hydrogens may be replaced by fluorine or one or two CH groups may be replaced by N, Z is a single bond, —CH2—CH2—, —CF2—CF2—, —CH?CH—, —CF?CF—, —CH?CF— or —CF?CH—, B is 2,6-disubstituted naphthalene, 2,6-disubstituted 5,6,7,8-tetrahydronaphthalene or 2,6-disubstituted trans-decalin, R? is R, F, OCF3, OCF2H, CF3, CI, SF5, CN or NCS, and m and n are, independently of one another, 0 or 1, comprising the following steps: a) conversion of a compound of the genera

Abstract: The invention relates to liquid-crystalline phenol esters of the formula I in which R, A1, Z1, m, L and Y are as defined in Claim 1, to liquid-crystalline media comprising at least one phenol ester of the formula I, and to electro-optical displays containing such a liquid-crystalline medium.

Abstract: The invention relates to liquid-crystalline compounds of the formula (I), where R11, X11, L11, Y and W are as defined in claim 1, and to the use thereof in liquid-crystalline media, to liquid-crystalline media comprising at least one compound of the formula (I) and to electro-optical displays containing a liquid-crystalline medium of this type.

Abstract: The invention relates to liquid-crystalline phenol esters of the formula I in which R, A1, Z1, m, L and Y are as defined in Claim 1, to liquid-crystalline media comprising at least one phenol ester of the formula I, and to electro-optical displays containing such a liquid-crystalline medium.

Abstract: Aldehydes containing a difluorooxymethylene bridge, of the general formula I OHC-(A11)m-Z11-(A12-Z12)n-(A13-Z13)p-A14I and the use and preparation thereof and the preparation of 1,3-dioxane compounds.

Abstract: A tetrahydropyran derivative comprising at least three cyclic rings and one aromatic endgroup of the formula A a process for preparing said tetrahydropyran derivatives, and the use of said tetrahydropyran derivatives as a component in a liquid crystal composition.

Abstract: The invention relates to tetrahydropyran derivatives of the general formula I and to processes for the preparation thereof.

Abstract: The present invention relates to a process for the preparation of a compound of the general formula R-(A1-Z-)mB—CF2O-A2-(A3)n-R???(I) in which R is alkyl, in which one or more CH2 groups may be replaced, independently of one another, by O, CF2, CH?CH, CH?CF or CF?CF, with the proviso that peroxide structures O—O and formaldehyde acetals O—CH2—O are excluded, A1 is, independently of one another, 1,4-cyclohexylene, 2,5-1,3-dioxanylene, 1,3-cyclobutylene or A2 and A3 are 1,4-phenylene, in which, independently of one another, from one to four hydrogens may be replaced by fluorine or one or two CH groups may be replaced by N, Z is a single bond, —CH2—CH2—, —CF2—CF2—, —CH?CH—, —CF?CF—, —CH?CF— or —CF?CH—, B is 2,6-disubstituted naphthalene, 2,6-disubstituted 5,6,7,8-tetrahydronaphthalene or 2,6-disubstituted trans-decalin, R? is R, F, OCF3, OCF2H, CF3, CI, SF5, CN or NCS, and m and n are, independently of one another, 0 or 1, comprising the following steps: a) conversion of a compound of the general formu

Abstract: Tetrahydropyran derivatives having at least one ester group (—CO—O—) and at least one group —CN, —NCS, —F, —Cl, —OCHF2, —OCF3, —CF3, —OCHFCF3, —OCF2CHFCF3, SF5, or —OCF2CF3; a process for preparing said tetrahydropyran derivatives, and the use of said tetrahydropyran derivatives as a component in a liquid crystal composition.

Abstract: The invention relates to a cutting subassembly for cutting off front and/or rear edge overhangs of panel-like workpieces. The cutting subassembly includes a saw unit which comprises a motor-driven saw blade which is mounted for displacement between a position above, and a position beneath, the workpiece. A contact element is associated with the saw blade and has at least one contact surface which may be engaged against the front or rear transverse side of the workpiece. The cutting plane of the saw blade may be oriented in alignment with the contact surface. The saw blade may be mounted such that it can be pivoted between a first operating position, in which it is oriented in alignment with the contact surface, and a second operating position, in which it is oriented obliquely in relation to the contact surface.

Abstract: The invention relates to liquid-crystalline phenol esters of the formula I in which R, A1, Z1, m, L and Y are as defined in Claim 1, to liquid-crystalline media comprising at least one phenol ester of the formula I, and to electro-optical displays containing such a liquid-crystalline medium.