Acta Crystallographica Section E

Structure Reports Online

Volume 68, Part 12 (December 2012)

organic compounds

im2411 scheme

Acta Cryst. (2012). E68, o3394-o3395    [ doi:10.1107/S1600536812046430 ]


A. Oukhrib, A. Benharref, M. Saadi, J.-C. Daran and M. Berraho

Abstract: The title compound, C16H23Br3, was synthesized from [beta]-himachalene (3,5,5,9-tetramethyl-2,4a,5,6,7,8-hexahydro-1H-benzocycloheptene), which was isolated from the essential oil of the Atlas cedar (Cedrus Atlantica). The molecule is built up from fused six- and seven-membered rings and an additional three-membered ring from the reaction of himachalene with dibromocarbene. The six-membered ring has an envelope conformation (the flap atom being the C atom shared with the three-membered ring, whereas the seven-membered ring displays a screw boat conformation; the dihedral angle between the rings (defined by the near coplanar atoms) is 56.5 (2)°.

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[ doi:10.1107/S1600536812046430/im2411Isup3.cml ]
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