Acta Cryst. (2009). E65, o2497-o2498  [ doi:10.1107/S1600536809036915 ]

Indizoline

H.-K. Fun, W. Maneerat, S. Laphookhieo and S. Chantrapromma

Abstract: The title compound [systematic name: 1-methoxy-2-(3-methylbut-2-enyl)-9H-carbazole-3-carbaldehyde], C₁₉H₁₉NO₂, is a natural carbazole which was isolated from the twigs of Clausena lansium. The carbazole ring system is essentially planar with a mean deviation of 0.0068 (10) Å. The aldehyde substituent is approximately co-planar with the attached benzene ring with a torsion angle of -8.58 (14)°, whereas the methoxy group is rotated out of the benzene plane with a torsion angle of -82.17 (11)°. The dihedral angle between the mean planes of the 3-methyl-2-butenyl group and the carbazole ring is 88.06 (5)°. An intermolecular N-HO interaction connects the molecules into a chain along the a axis. The crystal is further consolidated by a C-HO hydrogen bond and two - interactions with centroid-centroid distances of 3.6592 (6) and 3.7440 (6) Å.

Online 19 September 2009

Copyright © International Union of Crystallography
IUCr Webmaster