CH3CHCCH3COOH

CH3CHCCH3COOH, also known as 2-methylbut-2-enoic acid or tiglic acid, is an organic compound with the chemical formula C5H8O2. It is a monocarboxylic acid belonging to the unsaturated fatty acid family. Tiglic acid is a naturally occurring substance found in various plants, notably in the essential oils of croton oil and Roman chamomile. It exists as a white crystalline solid with a characteristic odor. The molecule features a four-carbon chain with a double bond between the second and third carbon atoms, and a methyl group attached to the second carbon, along with a carboxyl group at the end of the chain. This specific arrangement of atoms results in tiglic acid being a geometric isomer, specifically the E-isomer, of angelic acid. Tiglic acid has found applications in the flavor and fragrance industry due to its aromatic properties. It can also be synthesized in laboratories through various chemical reactions. Its presence in natural sources and its potential uses contribute to its scientific interest.