Crystal and molecular structure of goniothalamin [(+)-(6S)-5,6-dihydro-6-styryl-2-pyrone]
- 1 January 1975
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 4,p. 368-370
- https://doi.org/10.1039/p29750000368
Abstract
The crystal structure of goniothalamin has been determined from three-dimensional X-ray diffraction data. Crystals are monoclinic, with a= 9·710(3), b= 9·967(5), c= 5·691(3)Å, β= 98·72(3)°, Z= 2, space group P21. The structure was solved by direct methods and refined by full-matrix least-squares to R 0·040 for 789 observed reflections. The planar styryl group adopts a pseudo-equatorial position on the lactone ring, and is inclined at 88·1° to the mean plane of it. The ester group of the unsaturated lactone is non-planar, and the lactone ring has a modified skew-boat conformation.Keywords
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