(±)-Methyl 1-oxo-1H-spiro[benzo[c]pyran-3(4H),1′-cyclohexane]-4-carboxylate
✍ Scribed by Öztürk Yıldırım, Sema ;Akkurt, Mehmet ;Bogdanov, Milen G. ;Kandinska, Meglena I. ;Kazak, Canan
- Publisher
- International Union of Crystallography
- Year
- 2007
- Tongue
- English
- Weight
- 328 KB
- Volume
- 63
- Category
- Article
- ISSN
- 1600-5368
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✦ Synopsis
The molecule of the title compound, C~16~H~18~O~4~, is non-planar and the pyran ring adopts a half-chair conformation. Intermolecular C—H...O hydrogen-bond contacts link the molecules in the crystal structure, forming dimers approximately parallel to (011).
📜 SIMILAR VOLUMES
The crystal structure of the title compound, C 12 H 13 NO 3 S, is stabilized by intermolecular N-HÁ Á ÁO hydrogen bonds, which are formed between the NH groups and the sulfoxide O atoms.
In the paper by Fun, Wang, Xu, Li & Zhang [Acta Cryst. (2003), E59, o1827±o1829], two errors are corrected. First, in the second paragraph of the Comment, `C8ÐC13' on line 6 should read `C2ÐC13'. Secondly, in the third paragraph of the Comment, `the O3/C11/N2/C13 plane' on line 4 should read `the C1
A notable feature of the structure of the title compound, C 5 H 6 N 4 O 5 , is the presence of four crystallographically independent and essentially planar but otherwise unremarkable molecules in the asymmetric unit. The molecules are distributed as two pairs which differ in conformation from one pa