Abstract: Avoiding hexachlorobutadiene as the starting material, 2-chloro- and 2,3-dichloro-1,1,1,4,4,4-hexafluoro-2-butene are prepared by reacting a chlorobutene derivative of the formula (I)Cl.sub.2 C.dbd.CH-X (I)in whichX represents CCl.dbd.CCl.sub.2 or CCl.sub.2 --CCl.sub.2 H with hydrogen fluoride and chlorine in the presence of a catalyst at temperatures in the range of 50 to 550.degree. C.

Abstract: Novel (meth)acrylates containing fluoroalkenyl groups, of the formula (I) ##STR1## in which R represents hydrogen or methyl,n represents an integer from 2 to 6,A represents a (n+1)-valent hydrocarbon radical having 3 to 30 carbon atoms which optionally contains up to 10 oxygen atoms, andR.sup.1.sub.f and R.sup.2.sub.f independently of one another each represent a perfluoroalkyl radical having 1 to 20 carbon atoms, orR.sup.1.sub.f and R.sup.2.sub.f together form a ##STR2## bridge, in which x represents an integer from 1 to 8, andR.sup.3 represents hydrogen, fluorine, chlorine or a perfluoroalkyl radical having 1 to 20 carbon atoms,a process for their preparation, and their use for the preparation of coatings.

Abstract: The present invention provides a photosensitive imaging element comprising on a support a two-phase layer, said two-phase layer comprising a disperse hydrophobic photopolymerizable. phase and a hydrophilic continuous phase, characterized in that the hydrophobic photopolymerizable phase comprises a multifunctional monomer with a perfluoroalkyl or perfluoroalkenyl group.

Abstract: Chlorinated aromatics are obtained in a simple manner and in particularly good yield if the corresponding chloroformic esters are heated in the liquid phase to 90.degree. to 240.degree. C. in the presence of an inert organic solvent and a catalytic amount of one or more Lewis acids selected from the group consisting of the aluminium halides, iron halides and antimony halides.

Abstract: o-Alkylfluorobenzenes are advantageously prepared by heating the corresponding chloroformates to from 70.degree. to 200.degree. C. in the liquid phase in the presence of hydrogen fluoride and in the presence of an inert diluent other than a halogenated alkane.

Abstract: Novel (meth)acrylates containing fluoroalkenyl groups, of the formula (I) ##STR1## in which R represents hydrogen or methyl,n represents an integer from 2 to 6,A represents a (n+1)-valent hydrocarbon radical having 3 to 30 carbon atoms which optionally contains up to 10 oxygen atoms, andR.sup.1.sub.f and R.sup.2.sub.f independently of one another each represent a perfluoroalkyl radical having 1 to 20 carbon atoms, orR.sup.1.sub.f and R.sup.2.sub.f together form a ##STR2## bridge, in which x represents an integer from 1 to 8, andR.sup.3 represents hydrogen, fluorine, chlorine or a perfluoroalkyl radical having 1 to 20 carbon atoms,a process for their preparation, and their use for the preparation of coatings.

Abstract: The invention relates to novel 3,3-dioxy-4,4,4-trifluorobutyric acid derivatives of the formula (I) ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent C.sub.1 -C.sub.10 -alkyl, or represent cyclohexyl, or represent optionally substituted C.sub.6 -C.sub.10 -aryl or C.sub.7 -C.sub.14 -arylalkyl, orR.sup.1 and R.sup.2 together represent C.sub.2 -C.sub.4 -alkylene which is optionally mono- or disubstituted by methyl, or optionally substituted ortho-arylene,R.sup.3 represents hydrogen or C.sub.1 -C.sub.10 -alkyl, or represents cycloalkyl, or represents optionally substituted C.sub.6 -C.sub.10 -aryl or C.sub.7 -C.sub.

Abstract: 1,1,1,4,4,4-Hexafluorobutane (R 356) can be obtained in a simple manner and in excellent yields and with excellent selectivities when 1,1,1,4,4,4-hexafluorobutene is reacted in the liquid phase with hydrogen in the presence of a noble metal catalyst.

Abstract: Monomers of the formula (I) (for example, 3,3,4,4,5,5,6,6-octafluoromethylenecyclopentane) are described, as well as copolymers prepared from them and from one or more monomers copolymerizable with them. ##STR1## wherein n=3 to 5 The compounds are suitable for the production of a multiplicity of thermoplastically processable copolymers having various sets of properties which permit applications both as compact moulded parts and as coatings.

Abstract: 2-fluoro-cyclopropylamine is prepared in an advantageous manner by reacting an N-vinyl compound with a carbene of type FXC: (where X=chlorine or bromine) to give the corresponding cyclopropylamine derivative, replacing the radical X in this derivative by hydrogen, by reduction, and finally eliminating the other substituents on the hydrogen atom.

Abstract: A process for the preparation of side chain-fluorinated alkyloxazoles, wherein hydroxyalkyloxazoles are reacted with an .alpha.,.alpha.-difluoroalkylamine at pressures of under 2 bar, in the presence of an inert solvent boiling at above 100.degree. C. (at normal pressure), and new fluorinated alkyloxazoles.

Abstract: 1,1,1,4,4,4-hexafluoro-chlorobutenes are obtained by pyrolysis of 1,1,1-trifluoro-2,2-dichloroethane. The hexafluoro-chlorobutenes obtained in this way can be converted into hexafluorobutane, a CFC substitute, by hydrogenation.

Abstract: A process for preparing perfluoroalkoxy(alkylthio)benzenes from perfluorochloroalkoxy(alkylthio)-benzenes by reaction with hydrogen fluoride in the gas phase and in the presence of a catalyst.

Abstract: 1,1,1,4,4,4-Hexafluorobut-2-ene is prepared from chloro-fluorobutanes of the formula (I)CF.sub.3 --CH.sub.2 --CHCl--CX.sub.3 (I)in which the individual radicals X independently of each other represent chlorine and/or fluorine, by reaction with alkali metal fluoride in an aprotic polar solvent.

Abstract: The new N-substituted .alpha.-fluoroalkyl-lactams of the general formula ##STR1## in which the substituents and indices have the meaning indicated in the description, exhibit a strong action against pests and can be employed in particular for combating unwanted fungi.

Abstract: Halogenated aromatic compounds are prepared by passing esters of halogenoformic acid at temperatures in the range 150.degree. to 600.degree. C. and pressures from 0.1 to 3 bar over a catalyst containing chromium, magnesium, iron, silicon and/or aluminium, wherein if Al.sub.2 O.sub.3 catalysts are used these have been activated with hydrogen halide.

Abstract: 1,1,1,4,4,4-Hexafluorobutane is prepared by first reacting 1,1,3,4,4-pentachlorobuta-1,3-diene with hydrogen fluoride in the presence of catalysts at 60.degree. to 180.degree. C. to give 1,1,1,4,4,4-hexafluoro-2-chlorobutane, and converting this to 1,1,1,4,4,4-hexafluorobutane. On working up the product of the first stage of the process, it is possible to isolate novel compounds of formula (I):CF.sub.2 X--CH.sub.2 --R (I)in whichX is fluorine or chlorine andR is --CHCl--CF.sub.2 Cl, --CHCl--CFCl.sub.2 or --CCl.dbd.CCl.sub.2.

Abstract: Halogenated aromatics are prepared by heating halogenoformic acid esters to 80.degree. to 280.degree. C. in the presence of hydrogen fluoride or a catalytic amount of one or more Lewis acids from the group comprising aluminium halides, iron halides and antimony halides, and in the liquid phase.