3-Hydroxy-4-oxo-2-phenyl-4H-chromene-6-carboxylic acid dimethylformamide solvate
✍ Scribed by Liu, Chong-Bo ;Chen, Yun-Hua ;Zhou, Xiao-Ying ;Ding, Liang ;Wen, Hui-Liang
- Publisher
- International Union of Crystallography
- Year
- 2006
- Tongue
- English
- Weight
- 208 KB
- Volume
- 63
- Category
- Article
- ISSN
- 1600-5368
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📜 SIMILAR VOLUMES
Single-crystal X-ray study T = 193 K Mean '(C±C) = 0.002 A Ê R factor = 0.038 wR factor = 0.102 Data-to-parameter ratio = 12.7 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.
Single-crystal X-ray study T = 294 K Mean (C-C) = 0.006 A Disorder in solvent or counterion R factor = 0.046 wR factor = 0.133 Data-to-parameter ratio = 12.5 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.
The reaction of dimethyl 2-methyl-and dimethyl 2-phenyl-4-oxo-4H-chromen-3-yl-phosphonate with various aliphatic and aromatic amines was investigated. A novel class of cyclic phosphonic analogues of ehromone, 1 (2-methoxy-3-[l-(alkylamino)ethylidene or benzylidene]-2,3-dihydro-2,4-dioxo-2~.%benzo[e]