Abstract:
Perfluorocarbonyl compounds of the formulae IV and V ##STR1## in which R.sub.f denotes perfluoroalkyl, R'.sub.f denotes perfluoroalkylene, R denotes F, Cl, perfluoroalkyl or --OR"' (R"'=alkyl, aryl or aralkyl) and n denotes a number from 0 to 10, are prepared, starting from compounds of the formula I ##STR2## in which R.sub.f, R'.sub.f and n have the same meaning as in the formulae IV and V and R" is F, Cl or perfluoroalkyl, by electrolysis in an electrolyte consisting of fluorosulfonic acid/alkali metal fluorosulfonate and, if necessary, esterification with R"'OH, and decomposition ##STR3## in the presence of catalytic amounts of alkali metal fluorides and/or aprotic N-bases. Most of the compounds IV and V are new; the latter are, above all, valuable heat transfer fluids, lubricating oils or intermediates for the preparation of other F-organic compounds.
Abstract:
A perfluorocarbonyl compound of the formula ##STR1## wherein R.sub.f is perfluoroalkyl having 1 to 10 carbon atoms,R'.sub.f is perfluoroalkylene having 1 to 10 carbon atoms,R is fluorine, chlorine, perfluoroalkyl having 1 to 10 carbon atoms, or is alkoxy having 1 to 10 carbon atoms, andn is 0 to 10.
Abstract:
Omega-fluorosulfato-perfluoro-(2-methyl-alkan-3-ones) of the formula ##STR1## which are intermediates in the preparation of perfluoro-isopropylketocarboxylic acid fluorides from omega-hydro-perfluoro-(2-methyl-alkan-3-ones).
Abstract:
New perfluorinated vinyl ethers containing a secondary hydrogen atom in the molecule of the formula I ##STR1## in which n is 0-5, preferably 0-3 and particularly 0-2, are useful intermediate products (particularly for the preparation of polymeric intermediates and of perfluorinated cation exchangers containing carboxyl groups) and are prepared by(a) reacting 3-H-perfluorobutyryl fluoride IIFOC--CF.sub.2 --CHF--CF.sub.3 (II)with hexafluoropropene epoxide III ##STR2## to give the acid fluoride IV ##STR3## in which n has the same meaning as in formula I, (b) pyrolyzing the acid fluoride IV, as such or after conversion into the corresponding alkali metal carboxylate, at elevated temperature and(c) isolating the vinyl ether I formed in the pyrolysis.
Abstract:
What are disclosed are methods for making compounds of the formulaFSO.sub.2 --O--CF.sub.2 --R.sub.f --COY,useful as intermediates for making perfluorinated vinyl ethers, wherein R.sub.f is a single bond or perfluoralkylene and Y is fluorine or --OR, by heating an .alpha.,.omega.-bis-fluorosulfatoperfluoroalkane of the formulaFSO.sub.2 --O--CF.sub.2 --R.sub.f --CF.sub.2 --O--SO.sub.2 Fin the presence of an alkali metal fluoride and/or an alkali metal hydrogen fluoride and, when Y is OR, in the presence of an alkanol, ROH.
Abstract:
Monohydroperfluoroalkanesulfonic acid halides of the formula I ##STR1## in which R.sub.f =F or perfluoroalkyl, X=Cl or F and n=1-7, are prepared by reacting monohydroperfluoroalkanesulfonic acids of the formula II ##STR2## in which R.sub.f and n have the same meaning as in formula I, with pyrocatechol-phosphorus trichloride (.fwdarw.compounds I in which X=Cl) and, if desired, further reacting the products with alkali metal fluorides and/or alkali metal hydrogen fluorides (.fwdarw.compounds I in which X=F). With the exception of the compound in which R.sub.f =F, n=1 and X=Cl (.dbd.HCF.sub.2 --CF.sub.2 --SO.sub.2 Cl), the compounds I are new.The compounds I are chiefly intermediates in organic fluorine chemistry, in particular for the preparation of perfluorinated ion exchanger resins containing sulfonic acid groups.
Abstract:
2,3-Perfluoro-1,4-dioxanes of the formula I ##STR1## wherein X and Y independently from one another mean F or CF.sub.3, are manufactured by reacting carbonyl compounds of the formula II ##STR2## wherein X has the same meaning as in formula I,Y' has the same meaning as Y in formula I (F, CF.sub.3), and additionally can be Cl andZ=Cl, mesylate [=OSO.sub.2 CH.sub.3 ] or tosylate=[OSO.sub.2 C.sub.4 H.sub.6 --CH.sub.3 (p)],with alkali metal fluorides and/or with ammonium fluoride. The reaction products I, among which those wherein at least one of both radicals X and Y is CF.sub.3 are novel compounds, are solvents for highly fluorinated compounds and intermediates in various application fields.
Abstract translation:其中X和Y彼此独立地表示F或CF 3的式I(I)的2,3-全氟-1,4-二恶烷是通过式II的羰基化合物(II)制备的, 其中X具有与式I中相同的含义,Y'具有与式I(F,CF 3)中的Y相同的含义,并且另外可以是Cl和Z = Cl,甲磺酸酯[= OSO 2 CH 3]或甲苯磺酸酯= [OSO 2 C 4 H 6 -CH 3 (p)],与碱金属氟化物和/或氟化铵。 反应产物I,其中基团X和Y中的至少一个是CF 3的那些是新化合物,是用于高度氟化的化合物和各种应用领域的中间体的溶剂。
Abstract:
The invention relates to a process for the preparation of perfluorinated carbonyl fluorides of the formula ##STR1## by oligomerization of hexafluoropropene oxide in the presence of a catalyst. The catalyst comprises a mixture of an alkali metal fluoride, a carboxylic acid dinitrile and a polyethylene glycol dimethyl ether.
Abstract:
Halogenated aliphatic carboxylic acid fluorides are prepared by reacting halogenated aliphatic carboxylic acids with trihalogenomethyl aromatic compounds containing, as a predominant total or exclusively, fluorine atoms in the trihalogenomethyl groups, in particular with benzotrifluoride, in the presence of Lewis acids as catalysts. The reaction products are intermediate products having a multiplicity of uses.
Abstract:
The invention relates to a process for the addition of HF to halogenated alkenes by reacting these with at least one hydrofluoride of the formula [B.cndot.n HF], in which B is an organic nitrogen base and n is an integer or fraction .ltoreq.4, it being intended that the reaction of perfluoroiso-butene CF.sub.2 =C(CF.sub.3).sub.2 is excluded.