- FLUORINATION OF POLYHALOGENATED UNSATURATED COMPOUNDS WITH VANADIUM PENTAFLUORIDE
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Vanadium pentafluoride reacts with polyfluorinated and polychlorinated olefins, alkadienes, cycloalkenes and cyclodienes in CFCl3 or without a solvent at -25 deg C to 100 deg C, forming products of addition of two fluorine atoms across the C=C bond.
- Bardin, V. V.,Avramenko, A. A.,Furin, G. G.,Krasilnikov, V. A.,Karelin, A. I.,et al.
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p. 385 - 400
(2007/10/02)
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- ACTION OF VANADIUM AND ANTIMONY PENTAFLUORIDES ON POLYFLUORINATED DERIVATIVES OF CYCLOHEXADIENE
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Polyfluorinated 1,3- and 1,4-cyclohexadienes are fluorinated by vanadium fluoride at -25 to 25 deg C.The olefinic fragments of perfluoro-1,3- and perfluoro-1,4-cyclohexadienes are close to each other in reactivity.Under the influence of vanadium pentafluoride the fluorine atoms add to 1-R-heptafluoro-1,4-cyclohexadienes preferentially at the multiple bond containing the less electron-withdrawing substituent.At -80 to 20 deg C antimony pentafluoride leads to isomerization of the polyfluorinated derivatives of cyclohexadiene.
- Avramenko, A. A.,Bardin, V. V.,Furin, G. G.,Karelin, A. I.,Krasil'nikov, V. A.,Tushin, P. P.
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p. 1298 - 1303
(2007/10/02)
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- REACTION OF POLYFLUORINATED CYCLOALKANES WITH VANADIUM, ANTIMONY, AND NIOBIUM PENTAFLUORIDES
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Polyfluorinated cycloalkanes are fluorinated by vanadium pentafluoride at 25-60 deg C.Conjugation between the C=C bond of the cycloalkene and the aromatic ring facilitates the reaction, whereas the reactivity of the unconjugated olefin fragment is lower than or is equal to that of the aromatic ring.The antimony pentafluoride fluorinates polyhalogenocyclohexenes at 150 deg C, while niobium pentafluoride does not exhibit fluorinating characteristics under these conditions.
- Bardin, V. V.,Avramenko, A. A.,Petrov, V. A.,Krasil'nikov, V. A.,Karelin, A. I.,et al
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p. 536 - 540
(2007/10/02)
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