Acta Crystallographica Section C

Crystal Structure Communications

Volume 61, Part 5 (May 2005)

organic compounds

sk1811 scheme

Acta Cryst. (2005). C61, o332-o335 [doi:10.1107/S0108270105008528]

3,3a-Dihydrocyclopenta[b]chromen-1(2H)-ones from the reaction of salicylaldehyde and 2-cyclopenten-1-one

F.-J. Huo, C.-X. Yin, X.-L. Jin and P. Yang

Abstract: The two title chromene compounds, 3,3a-dihydrocyclopenta[b]chromen-1(2H)-one, C₁₆H₁₂O₂, (I), and 2-(2-hydroxybenzylidene)-3,3a-dihydrocyclopenta[b]chromen-1(2H)-one, C₁₉H₁₄O₃, (II), have been determined in the monoclinic space group P2₁/n. Compound (I) is mainly stabilized by C-H [bold pi] interactions. Compound (II) is linked into infinite one-dimensional chains with a C(3) motif via intermolecular O-HO hydrogen bonds. The intermolecular C-H and - interactions also play key roles in stabilizing the crystal packing. Two intramolecular C-HO hydrogen bonds with S(5) motifs were detected in (II).

Formula: C₁₂H₁₀O₂ and C₁₉H₁₄O₃


	Structure factor file (CIF format) (79.4 kbytes) Contains datablock I

	Structure factor file (CIF format) (127.5 kbytes) Contains datablock II

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