The protonation of furan- and thiophen-carboxamides
- 1 January 1979
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 12,p. 1700-1702
- https://doi.org/10.1039/p29790001700
Abstract
The protonation behaviour in aqueous sulphuric acid solution of various furan- and thiophen-carboxamides has been investigated by u.v. spectrophotometry. The pKBH+ values, calculated using the HA acidity function and the Bunnett–Olsen linear free energy relationship, indicate the lower basicity of furan- and thiophen-2-carboxamides with respect to that of benzamides and of the 3-derivatives. The question of the site of protonation is also discussed.Keywords
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