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Crotonic acid, or trans-2-butenoic acid, is a short-chain unsaturated carboxylic acid, described by the formula CH3CH=CHCO2H. Crotonic acid is so named because it was erroneously thought to be a saponification product of croton oil. It crystallizes as needles from hot water.
Additional recommended knowledge
Isocrotonic acid (or quartenylic acid) is the cis analogue of crotonic acid. It is an oil, possessing a smell similar to that of brown sugar. It boils at 171.9°C, concomitant with conversion into crotonic acid. Isomerizaton is complete when the cis acid is heated to 170-180°C in a sealed tube.
This article incorporates text from the Encyclopædia Britannica Eleventh Edition, a publication now in the public domain.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Crotonic_acid". A list of authors is available in Wikipedia.|