Benzoanellierte Centropolyquinane, 4. Sterische Effekte in mehrfach substituierten Triptindanen (9H, 10H-4b, 9a-([1,2]Benzenomethano)indeno[1,2-a]indenen)
✍ Scribed by Paisdor, Bernd ;Grützmacher, Hans-Friedrich ;Kuck, Dietmar
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1988
- Tongue
- English
- Weight
- 576 KB
- Volume
- 121
- Category
- Article
- ISSN
- 0009-2940
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📜 SIMILAR VOLUMES
In the molecule of the title compound, C 20 H 20 Br 2 N 4 O 7 , one ethyl group is disordered over two positions; site-occupation factors were fixed at 0.63 and 0.37. The non-planar seven-and six-membered rings adopt chair conformations, while the two five-membered rings have envelope conformations.
The title compound, C 21 H 23 BrN 4 O 8 , is a glycoluril derivative in which the oxadiazinane six-membered ring displays a normal chair conformation. The methoxy and Br groups attached to the phenyl ring are disordered in a 0.847 (4):0.153 (4) ratio and the pendant ethoxy group is disordered over t