Direct syntheses of pentakis(trifluoromethyl)cyclopentadienide salts and related systems

The well-established synthesis of heptafluorobut-2-ene 2 from hexachlorobutadiene 1 and potassium fluoride has been further investigated, and novel dienes 3 and a triene 4 have been observed. Remarkably, the potassium salt of pentakis(trifluoromethyl)cyclopentadienide 7 has been isolated from this s...

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Bibliographic Details
Published in:Canadian journal of chemistry 1996-11, Vol.74 (11), p.1925-1929
Main Authors: Chambers, Richard D, Roche, Alex J, Vaughan, Julian F.S
Format: Article
Language:English
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Summary:The well-established synthesis of heptafluorobut-2-ene 2 from hexachlorobutadiene 1 and potassium fluoride has been further investigated, and novel dienes 3 and a triene 4 have been observed. Remarkably, the potassium salt of pentakis(trifluoromethyl)cyclopentadienide 7 has been isolated from this system. Salt 7 has also been obtained directly from 2 . Cyclopentadiene 6 has been isolated from salt 7 by distillation from sulphuric acid. Bi-and tri-cyclic analogues of 7 have also been obtained, i.e., 9 and 10 , by reaction of 2 with perfluorocyclopentene. Key words: heptafluorobut-2-ene, pentakis(trifluoromethyl)cyclopentadienide, 5H-pentakis(trifluoromethyl)cyclopentadiene.
ISSN:0008-4042
1480-3291
DOI:10.1139/v96-218