3-Benzyl-2,4,6-triphenylpyrylium tetrafluoroborate
✍ Scribed by Jara, Francisco ;Domínguez, Moisés ;Rezende, Marcos C. ;Tiekink, Edward R. T. ;Wardell, James L. ;Wardell, Solange M. S. V.
- Publisher
- International Union of Crystallography
- Year
- 2006
- Tongue
- English
- Weight
- 387 KB
- Volume
- 62
- Category
- Article
- ISSN
- 1600-5368
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✦ Synopsis
Single-crystal X-ray study T = 120 K Mean (C-C) = 0.003 A R factor = 0.055 wR factor = 0.142 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.
📜 SIMILAR VOLUMES
The tetrahydropyrimidine ring of the title molecule, C 11 H 11 FN 2 OS, adopts a half-chair conformation. In the crystal structure, the molecules are linked to form centrosymmetric hydrogen-bonded dimers.
In the title centrosymmetric molecule, C 16 H 8 F 4 N 2 , the dihedral angle between the pyridine and benzene rings is 50.47 (5) , which is intermediate between those observed when the central ring is benzene and when it is an anthracene. The crystal structure consists of layers of molecules paralle
&~&act: Direct irradiation of o-cinnamylphenols la-c led to mixtures of the &-isomers 3a-c, the dihydrobenzofurans 4a-c and the dihydrobenzopyrans 5a-c. Under the same condilions, ohydroxystilbenes Za,b gave their c&isomers 9a,b as single photoproducts. Using 2,4,6\_triphenylpyrylium tetrafluorobora
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