Tags: Chemical Compound, Chemical Substance.

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.Racemic threonine can be prepared from crotonic acid by alpha-functionalization using mercury(II) acetate.

Crotonic_acid.svg
IUPAC name
(E)-but-2-enoic acid

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