Acta Cryst. (2013). E69, o64
[ doi:10.1107/S1600536812049598 ]

2-Hydroxy-4-(prop-2-ynyloxy)benzaldehyde

V. Selvarani, M. A. Neelakantan, V. Silambarasan and D. Velmurugan

Abstract: The asymmetric unit of the title compound, C₁₀H₈O₃, contains two independent molecules, both of which are almost planar (r.m.s deviations for all non-H atoms of 0.044 and 0.053 Å). The dihedral angles between the benzene ring and the prop-1-yne group are 3.47 (1) and 3.07 (1)° in the two molecules, and the prop-1-yne groups adopt extended conformations. In each molecule, an intramolecular O-HO hydrogen bond involving the OH and aldehyde substituents forms an S(6) ring. In the crystal, molecules are linked into cyclic centrosymmetric dimers via C-HO hydrogen bonds, generating R₂²(14) ring motifs. The crystal structure is further stabilized by aromatic - stacking interactions between the benzene rings [centroid-centroid distances = 3.813 (2) and 3.843 (2) Å]

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