Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 7 (July 2013)

organic compounds

Acta Cryst. (2013). E69, o1037-o1038    [ doi:10.1107/S160053681301502X ]


A. Benharref, J. El Karroumi, L. El Ammari, M. Saadi and M. Berraho

Abstract: The title compound, C16H24Br2O, was synthesized from the reaction of [beta]-himachalene (3,5,5,9-tetra­methyl-2,4a,5,6,7,8-hexa­hydro-1H-benzo­cyclo­heptene), which was isolated from Atlas cedar (Cedrus atlantica) essential oil, after reaction with di­bromo­carbene. The asymmetric unit contains two independent mol­ecules with similar conformations. Each mol­ecule is built up from fused six-and seven-membered rings and two three-membered rings. In both mol­ecules, the six-membered ring has an envelope conformation with the flap provided by the C atom of the ep­oxy ring, whereas the seven-membered ring displays a chair conformation. The crystal packing is governed only by van der Waals inter­actions. The absolute configuration was established from anomalous dispersion effects.

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