作者:A. Chiaroni、C. Riche、A. Benharref、E. Lassaba、A. Baouid
DOI:10.1107/s0108270196005756
日期:1996.10.15
The stereochemistry of the minor isomer, 3,4:9,9a-diepoxy-3,5,5,9-tetramethyldecahydro-1H-benzocycloheptene, C15H24O2, resulting from the epoxidation of beta-himachalene has been established. The atoms C10 and the gem-dimethyl groups C14 and C15 adopt two positions leading to two conformations for the seven-membered ring, boat-shaped (occupation factor 70%) and chair-shaped (30%). Modelling of these conformations agrees with the statistical distribution in the crystal.