Acta Cryst. (2007). E63, o3681  [ doi:10.1107/S1600536807037403 ]

(1S,3R,6S)-3-Chloro-trans-himachalene

A. Benharref, N. Mazoir, B. Moha, L. Essediya and J.-C. Daran

Abstract: The title compound, C₁₅H₂₅Cl, was semi-synthesized from natural essential oils of Cedrus atlantica. The stereochemistry has been confirmed by single-crystal X-ray diffraction. The asymmetric unit contains two chemically identical molecules. Each is built up from two fused six- and seven-membered rings. In both molecules, the six-membered ring has a perfect chair conformation, whereas the seven-membered ring displays a twist-chair conformation. In one molecule, the seven-membered ring is partially disordered with a site-occupancy ratio of 0.52:0.48.

Online 3 August 2007

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