Fire-retardant polyesters based upon 2,3-dicarboxy-5,8-endomethylene-5,6,7,8,9,9-hexachloro-1,2,3,4,4a,5,8,8a-octahydronaphthalene anhydride
✍ Scribed by Carleton W. Roberts; D. H. Haigh; R. J. Rathsack
- Publisher
- John Wiley and Sons
- Year
- 1964
- Tongue
- English
- Weight
- 865 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0021-8995
No coin nor oath required. For personal study only.
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Single-crystal X-ray study T = 293 K Mean '(C±C) = 0.004 A Ê R factor = 0.033 wR factor = 0.112 Data-to-parameter ratio = 9.6 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.
The title compound, C 15 H 20 O 4 , also known as dihydrohelenalin, is a drug obtained from a Chinese plant. It contains a seven-membered ring in a chair conformation and two fivemembered rings in twist conformations. The crystal packing involves O-HÁ Á ÁO hydrogen bonds. ## Related literature Fo