Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing
Patent
1992-03-12
1993-10-19
Siegel, Alan
Organic compounds -- part of the class 532-570 series
Organic compounds
Halogen containing
570123, C07C 1720, C07C 1700
Patent
active
052547728
ABSTRACT:
A process for the preparation of an alkane containing fluorine by contacting a halogenated alkane containing at least one hydrogen atom and at least one halogen atom selected from chlorine, bromine and iodine with a transition metal fluoride selected from osmium hexafluoride, iridium hexafluoride, rhenium hexafluoride, ruthenium pentafluoride, chromium pentafluoride, vanadium pentafluoride, rhenium heptafluoride and uranium hexafluoride, whereby to replace at least one hydrogen atom or at least one chlorine, bromine or iodine atom in said halogenated alkane starting material by a fluorine atom.
Use of certain of the defined transition metal fluorides, e.g. OsF.sub.6, IrF.sub.6 and ReF.sub.6 allows the selective replacement of halogen by fluorine, while others, e.g. UF.sub.6, VF.sub.5 and ReF.sub.7 allow selective replacement of hydrogen by fluorine.
REFERENCES:
patent: 2423045 (1943-09-01), Passino et al.
patent: 2759026 (1950-02-01), McCleary
patent: 3235608 (1962-03-01), Gibbs
patent: 3972953 (1976-08-01), Lyons
Dukat Wolfgang W.
Holloway John H.
Hope Eric G.
Powell Richard L.
Rieland Matthias
Imperial Chemical Industries plc
Siegel Alan
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