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Volume 68 
Part 12 
Pages o3394-o3395  
December 2012  

Received 6 November 2012
Accepted 9 November 2012
Online 24 November 2012

Key indicators
Single-crystal X-ray study
T = 180 K
Mean [sigma](C-C) = 0.006 Å
R = 0.034
wR = 0.075
Data-to-parameter ratio = 19.7
Details
Open access

(1S,3R,8R)-2,2-Dibromo-10-bromomethyl-3,7,7-trimethyltricyclo[6.4.0.01,3]dodec-9-ene

aLaboratoire de Chimie des Substances Naturelles, "Unité Associé au CNRST (URAC16)", Faculté des Sciences Semlalia, BP 2390 Bd My Abdellah, 40000 Marrakech, Morocco,bLaboratoire de Chimie du Solide Appliquée, Faculté des Sciences, Avenue Ibn Battouta, BP 1014 Rabat, Morocco, and cLaboratoire de Chimie de Coordination, 205 route de Narbonne, 31077 Toulouse Cedex 04, France
Correspondence e-mail: berraho@uca.ma

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)°.

Related literature

For the isolation of [beta]-himachalene, see: Joseph & Dev (1968[Joseph, T. C. & Dev, S. (1968). Tetrahedron, 24, 3841-3859.]); Plattier & Teiseire (1974[Plattier, M. & Teiseire, P. (1974). Recherche, 19, 131-144.]). For the reactivity of this sesquiterpene, see: Lassaba et al. (1997[Lassaba, E., Chekroun, A., Benharref, A., Chiaroni, A., Riche, C. & Lavergne, J.-P. (1997). Bull. Soc. Chim. Belg. 106, 281-288.]); Chekroun et al. (2000[Chekroun, A., Jarid, A., Benharref, A. & Boutalib, A. (2000). J. Org. Chem. 65, 4431-4434.]); El Jamili et al. (2002[El Jamili, H., Auhmani, A., Dakir, M., Lassaba, E., Benharref, A., Pierrot, M., Chiaroni, A. & Riche, C. (2002). Tetrahedron Lett. 43, 6645-6648.]); Sbai et al. (2002[Sbai, F., Dakir, M., Auhmani, A., El Jamili, H., Akssira, M., Benharref, A., Kenz, A. & Pierrot, M. (2002). Acta Cryst. C58, o518-o520.]); Dakir et al. (2004[Dakir, M., Auhmani, A., Ait Itto, M. Y., Mazoir, N., Akssira, M., Pierrot, M. & Benharref, A. (2004). Synth. Commun. 34, 2001-2008.]); Benharref et al. (2010[Benharref, A., El Ammari, L. & Berraho, M. (2010). Acta Cryst. E66, o2911.]). For its biological activity, see: Daoubi et al. (2004[Daoubi, M., Duran -Patron, R., Hmamouchi, M., Hernandez -Galan, R., Benharref, A. & Isidro, G. C. (2004). Pest. Manag. Sci. 60, 927-932.]). For conformational analysis, see: Cremer & Pople (1975[Cremer, D. & Pople, J. A. (1975). J. Am. Chem. Soc. 97, 1354-1358.]).

[Scheme 1]

Experimental

Crystal data
  • C16H23Br3

  • Mr = 455.07

  • Orthorhombic, P 21 21 21

  • a = 9.2614 (5) Å

  • b = 12.8215 (8) Å

  • c = 14.3966 (11) Å

  • V = 1709.52 (19) Å3

  • Z = 4

  • Mo K[alpha] radiation

  • [mu] = 7.07 mm-1

  • T = 180 K

  • 0.49 × 0.31 × 0.08 mm

Data collection
  • Agilent Xcalibur (Sapphire1, long nozzle) diffractometer

  • Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2010[Agilent (2010). CrysAlis PRO. Agilent Technologies Ltd, Yarnton, England.]) Tmin = 0.135, Tmax = 1.000

  • 9721 measured reflections

  • 3461 independent reflections

  • 3121 reflections with I > 2[sigma](I)

  • Rint = 0.049

Refinement
  • R[F2 > 2[sigma](F2)] = 0.034

  • wR(F2) = 0.075

  • S = 1.04

  • 3461 reflections

  • 176 parameters

  • H-atom parameters constrained

  • [Delta][rho]max = 0.66 e Å-3

  • [Delta][rho]min = -0.55 e Å-3

  • Absolute structure: Flack (1983[Flack, H. D. (1983). Acta Cryst. A39, 876-881.]), 1460 Friedel pairs

  • Flack parameter: 0.012 (16)

Data collection: CrysAlis PRO (Agilent, 2010[Agilent (2010). CrysAlis PRO. Agilent Technologies Ltd, Yarnton, England.]); cell refinement: CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012[Farrugia, L. J. (2012). J. Appl. Cryst. 45, 849-854.]); software used to prepare material for publication: WinGX (Farrugia, 2012[Farrugia, L. J. (2012). J. Appl. Cryst. 45, 849-854.]).


Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: IM2411 ).


Acknowledgements

The authors thank the Unit of Support for Technical and Scientific Research (UATRS and CNRST) for the X-ray measurements.

References

Agilent (2010). CrysAlis PRO. Agilent Technologies Ltd, Yarnton, England.
Benharref, A., El Ammari, L. & Berraho, M. (2010). Acta Cryst. E66, o2911.  [CSD] [CrossRef] [details]
Chekroun, A., Jarid, A., Benharref, A. & Boutalib, A. (2000). J. Org. Chem. 65, 4431-4434.  [CrossRef] [PubMed] [ChemPort]
Cremer, D. & Pople, J. A. (1975). J. Am. Chem. Soc. 97, 1354-1358.  [CrossRef] [ChemPort] [ISI]
Dakir, M., Auhmani, A., Ait Itto, M. Y., Mazoir, N., Akssira, M., Pierrot, M. & Benharref, A. (2004). Synth. Commun. 34, 2001-2008.  [ISI] [CrossRef] [ChemPort]
Daoubi, M., Duran -Patron, R., Hmamouchi, M., Hernandez -Galan, R., Benharref, A. & Isidro, G. C. (2004). Pest. Manag. Sci. 60, 927-932.  [CrossRef] [PubMed] [ChemPort]
El Jamili, H., Auhmani, A., Dakir, M., Lassaba, E., Benharref, A., Pierrot, M., Chiaroni, A. & Riche, C. (2002). Tetrahedron Lett. 43, 6645-6648.  [ChemPort]
Farrugia, L. J. (2012). J. Appl. Cryst. 45, 849-854.  [ISI] [CrossRef] [ChemPort] [details]
Flack, H. D. (1983). Acta Cryst. A39, 876-881.  [CrossRef] [details]
Joseph, T. C. & Dev, S. (1968). Tetrahedron, 24, 3841-3859.  [CrossRef] [ChemPort] [ISI]
Lassaba, E., Chekroun, A., Benharref, A., Chiaroni, A., Riche, C. & Lavergne, J.-P. (1997). Bull. Soc. Chim. Belg. 106, 281-288.  [ChemPort]
Plattier, M. & Teiseire, P. (1974). Recherche, 19, 131-144.  [ChemPort]
Sbai, F., Dakir, M., Auhmani, A., El Jamili, H., Akssira, M., Benharref, A., Kenz, A. & Pierrot, M. (2002). Acta Cryst. C58, o518-o520.  [CSD] [CrossRef] [ChemPort] [details]
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.  [CrossRef] [details]


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

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