Acta Cryst. (2008). E64, o2157  [ doi:10.1107/S1600536808033862 ]

2,2,10-Trimethyl-2,3-dihydropyrano[2,3-a]carbazol-4(11H)-one

M. Sridharan, K. J. R. Prasad, A. Ngendahimana and M. Zeller

Abstract: The title compound, C₁₈H₁₇NO₂, was prepared from 1-hydroxy-8-methylcarbazole and 3,3-dimethylacrylic acid with trifluoroacetic acid as the cyclization catalyst. Due to the -CMe₂- group, the molecule is not quite planar. The packing is dominated by the strong N-HO hydrogen bonds and some weaker C-HO and C-H interactions. - Stacking interactions [centroid-centroid separation = 3.806 (2) Å] join neighboring molecules into loosely connected inversion dimers.

Online 22 October 2008

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