Acta Cryst. (2013). E69, o724
[ doi:10.1107/S1600536813009070 ]
Abstract: The title compound, C17H24Br2Cl2, was synthesized from -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 contains fused six-, seven- and two three-membered rings. The six-membered ring has a half-chair conformation, while the seven-membered ring displays a boat conformation. The absolute structure was unambiguously established from anomalous dispersion effects. The crystal packing exhibits no short intermolecular contacts.
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