Acta Cryst. (2008). E64, o1456  [ doi:10.1107/S1600536808020801 ]

2-(4-Isopropylbenzylidene)propanoic acid

N. Muhammad, M. N. Tahir, S. Ali, Zia-ur-Rehman and M. A. Kashmiri

Abstract: The two molecules in the asymmetric unit of the title compound, C₁₃H₁₆O₂, form dimers through O-HO hydrogen bonding, resulting in R₂²(8) rings. Each carboxyl O atom is involved in interamolecular C-HO hydrogen bonds, forming five-membered rings. There exist dissimilar dihedral angles within the two molecules, for example the carboxylate and isopropyl groups make dihedral angles of 59.6 (4) and 71.7 (3)° in the two molecules. There are no intermolecular interactions.

Online 12 July 2008

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