The prolonged photo-Arbuzov reaction (3 weeks, Hg lamp) of 1,3,5-trichloro-benzene with a large excess of trimethyl phosphite (as a solvent) at 508 gives moderate yields of dimethyl (3,5-dichlorophenyl)phosphonate (1; 14.5%), tetramethyl (5-chloro-1,3-phenylene)bis[phosphonate] (2; 35.4%), and hexam
Benzene-1,2,3-triyl tris(benzenesulfonate)
✍ Scribed by Xiao, Zhu-Ping ;Li, Huan-Qiu ;Shi, Lei ;Fang, Rui-Qin ;Zhu, Hai-Liang
- Book ID
- 104491719
- Publisher
- International Union of Crystallography
- Year
- 2007
- Tongue
- English
- Weight
- 712 KB
- Volume
- 63
- Category
- Article
- ISSN
- 1600-5368
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✦ Synopsis
The title compound, C 24 H 18 O 9 S 3 , crystallizes with two molecules per asymmetric unit, with distinctly different conformations, as quantified by the C-O-S-C torsion angles.
📜 SIMILAR VOLUMES
In the title molecule, C 24 H 18 O 3 S 3 , all bond lengths and angles are normal. The three thiophene rings make dihedral angles of 21.7 (3), 19.3 (7) and 4.8 (4) with the central benzene ring. The crystal packing is stabilized by weak intermolecular C-HÁ Á ÁO hydrogen bonds andinteractions.
Nucleophilic substitution on 2,4,6-trichloropyrimidine (1) with 4-dimethylaminopyfidine, 1-methylimidazole and 4-(pyrrolidin-1-yl)pyridine forms the (pyrimidin-2,4,6-triyl)-tris-hetarenium salts 3, 4 and 5, respectively. Whereas the chlorides 3a, 4a, and 5a are hygroscopic, stabilization can be achi
Single-crystal X-ray study T = 150 K Mean '(C±C) = 0.003 A Ê R factor = 0.034 wR factor = 0.094 Data-to-parameter ratio = 10.0 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.