(1S,3R,8R,9R,10S)-2,2-Dibromo-3,7,7,10-tetra-methyl-9ß,10ß-ep-oxy-3,7,7,10-tetra-methyl-tricyclo-[6.4.0.0(1,3)]dodeca-ne.
Acta Crystallogr Sect E Struct Rep Online
; 69(Pt 4): o521-2, 2013 Apr 01.
Article
em En
| MEDLINE
| ID: mdl-23634065
ABSTRACT
The title compound, C16H24Br2O, was synthesized from ß-himachalene (3,5,5,9-tetra-methyl-2,4a,5,6,7,8-hexa-hydro-1H-benzocyclo-heptene), which was isolated from the essential oil of the Atlas cedar (Cedrus atlantica). The mol-ecule contains fused six- and seven-membered rings, each linked to a three-membered ring. The six-membered ring has a half-chair conformation, while the seven-membered ring displays a chair conformation. The dihedral angle between the mean planes through the six- and seven-membered rings is 39.55â
(12)°. The two three-membered rings, linked to the six- and seven-membered rings, are nearly perpendicular to the six-membered ring, making dihedral angles of 78.6â
(2) and 80.5â
(2)°, respectively. The absolute structure was established unambiguously from anomalous dispersion effects. In the crystal, each mol-ecule is linked to its symmetry-equivalent partner by C-Hâ¯O hydrogen bonds, forming zigzag chains parallel to [100].
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1
Base de dados:
MEDLINE
Idioma:
En
Revista:
Acta Crystallogr Sect E Struct Rep Online
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Marrocos