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

(1S,3R,8R)-2,2-Dibromo-10-bromomethyl-3,7,7-trimethyltricyclo[6.4.0.0^1,3]dodec-9-ene

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

Abstract: The title compound, C₁₆H₂₃Br₃, 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 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)°.

Copyright © International Union of Crystallography
IUCr Webmaster