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Acta Cryst. (2013). E69, o739
[ doi:10.1107/S1600536813010040 ]

(1S,3R,8R,9S,11R)-10,10-Dibromo-2,2-dichloro-3,7,7,11-tetramethyltetracyclo[6.5.0.01,3.09,11]tridecane

A. Oukhrib, A. Benharref, M. Saadi, M. Berraho and L. El Ammari

Abstract: The title compound, C17H24Br2Cl2, 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 asymmetric unit contains two independent molecules. Each molecule is built up from fused six-, seven- and two three-membered rings. In both molecules, the six-membered ring has a half-chair conformation, whereas the seven-membered ring displays a boat conformation. No specific intermolecular interactions are noted in the crystal packing.


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