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The title compound, C16H22Br2O, was synthesized from β-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, with the C atom belonging to the three-membered ring forming the flap, whereas the seven-membered ring displays a screw-boat conformation; the dihedral angle between the rings (all atoms) is 60.92 (16)°.

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The title compound, C16H23Br3, was synthesized from β-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)°.

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In the mol­ecule of the title compound, C15H12ClNO3, the chloro­benzamide and benzoate units are almost co-planar, with a dihedral angle between the six-membered rings of 2.99 (10)°. An intra­molecular N—H...O hydrogen bond occurs. In the crystal, each mol­ecule is linked to a symmetry-equivalent counterpart across a twofold rotation axis by weak C—H...O and C—H...Cl hydrogen bonds, forming dimers. The packing is stabilized through weak π–π stacking along the b-axis direction, leading to π-stacked columns of inversion-related mol­ecules, with an inter­planar distance of 3.46 (2) Å and a centroid–centroid vector of 3.897 (2) Å.
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