2-Hydroxy-6,6-dimethylbicyclo[3.1.1]heptane-2-carboxylic acid

Abstract

The title compound, C10H16O3, with a bicyclo[3.1.1]heptane unit, was obtained by oxidation of β-pinene. The asymmetric unit contains two independent molecules with similar geometry: the six-membered rings in both molecules adopt envelope conformations. In the crystal, the independent molecules exist as O—H...O hydrogen-bonded dimers. The dimers are linked into helical chains along the b axis by O—H...O hydrogen bonds.