Acta Cryst. (2007). E63, o2834  [ doi:10.1107/S1600536807021332 ]

-(3,6,9-Trimethyl-9-xanthenyl)propionic acid

J. B. Kyziol, E. M. Nowakowska and J. Zaleski

Abstract: The title compound, C₁₉H₂₀O₃, was obtained, among other condensation products, from the reaction of meta-cresol and levulinic acid. The pyrane ring closure does not alter significantly the environment of the ethereal linkage in comparison with diaryl ethers. The deformations of the endocyclic valence angles in the benzene rings, centred on the C atoms substituted with alkyl groups, is greater than expected. The molecular packing is influenced by O-HO hydrogen bonds, leading to centrosymmetric dimers.

Online 5 May 2007

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