Acta Cryst. (2008). E64, o854  [ doi:10.1107/S1600536808005990 ]

Methyl 9H-xanthene-9-carboxylate

P. M. Dean, J. Turanjanin and D. R. MacFarlane

Abstract: The title compound, C₁₅H₁₂O₃, was obtained unintentionally as the by-product of an attempted recrystallization from methanol of propantheline bromide, an antimuscarinic drug. The xanthone unit is folded, with a dihedral angle of 24.81 (9)° between the benzene rings. The ester substituent adopts a trans staggered conformation, with a C-C-O-C torsion angle of 178.4 (1)°. The molecules pack in distinct layers, facilitated by C-H and weak - ring interactions. A weak C-HO interaction also occurs; however, no classical hydrogen bonding is observed.

Online 16 April 2008

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