Acta Crystallographica Section E

Structure Reports Online

Volume 68, Part 1 (January 2012)


organic compounds



hb6535 scheme

Acta Cryst. (2012). E68, o38    [ doi:10.1107/S1600536811051749 ]

9-(7-Fluoro-4-oxo-4H-chromen-3-yl)-3,3,6,6-tetramethyl-2,3,4,5,6,7,8,9-octahydro-1H-xanthene-1,8-dione

M. Asad, C.-W. Oo, H. Osman, H.-K. Fun and S. Arshad

Abstract: In the title compound, C26H25FO5, the terminal cyclohexane rings of the xanthene ring system adopt half-boat conformations. The 4H-chromene ring make a dihedral angle of 87.94 (5)° with the xanthene ring system and its carbonyl O atom lies above the xanthene O atom. In the crystal, molecules are linked into ribbons propagating along the a-axis direction by C-H...O hydrogen bonds. Aromatic [pi]-[pi] stacking interactions [centroid-centroid distance = 3.7367 (12) Å] also occur.


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