Crystal structure of (1S,3R,8R,9R,10S)-2,4,6-tris­(2,2-di­chloro-3,7,7,10-tetra­methyl­tri­cyclo­[,3]dodec-9-yl)cyclo­triboroxane


The title compound, C48H75B3Cl6O3, was synthesized in two steps from β-himachalene (3,5,5,9-tetra-methyl-2,4a,5,6,7,8-hexa-hydro-1H-benzo-cyclo-hept-ene), which was isolated from the essential oil of the Atlas cedar (Cedrus Atlantica). The mol-ecule consists of an almost planar cyclo-triboroxane ring [maximum deviation = 0.036 (2) Å] linked to three identical fused ring systems with different conformations. Each of the three attached ring systems is built up from a seven-membered ring to which a six- and a three-membered ring are fused. The three six-membered rings have a twist-boat conformation, whereas the seven-membered rings display boat, chair and twist-boat conformations. The dihedral angles between the central boroxane ring and the mean planes of the attached six-membered rings are 63.67 (18), 54.89 (2) and 56.57 (19)°. The crystal packing is governed only by van der Waals inter-actions.

DOI: 10.1107/S2056989015013390

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@inproceedings{Benharref2015CrystalSO, title={Crystal structure of (1S,3R,8R,9R,10S)-2,4,6-tris­(2,2-di­chloro-3,7,7,10-tetra­methyl­tri­cyclo­[,3]dodec-9-yl)cyclo­triboroxane}, author={Ahmed Benharref and Lahcen El Ammari and Mohamed Saadi and Noureddine Mazoir and Moha Berraho}, booktitle={Acta crystallographica. Section E, Crystallographic communications}, year={2015} }