Chopra, D and Mohan, TP and Vishalakshi, B and Row, Guru TN (2006) 4-(4-Fluoro-3-phenoxyphenyl)-6-(4-fluorophenyl)-2-oxo-1,2 dihydropyridine-3-carbonitrile and the 6-(4-methylphenyl) -analogue. In: Acta Crystallographica Section C-Crystal Structure Communications, 62 (9). O540-O543.
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The crystal structures of the title compounds, viz. C24H14F2N2O2, (I), and C25H17FN2O2, (II), respectively, have been determined in order to unravel the role of an ordered F atom in generating stable supramolecular assemblies. On changing the substitution from fluorine to a methyl group, C H F-... interactions are replaced by C-H-...pi interactions, revealing the importance of such weak interactions when present alongside N-(HO)-O-... and C-(HO)-O-... hydrogen bonds. The dihedral angle between the planes of the 4-fluorophenyl ring and the pyridine ring is 26.8 (1)degrees in (I), while that between the planes of the 4-methylphenyl and pyridine rings is 29.5 (1)degrees in (II).
| Item Type: | Journal Article |
|---|---|
| Publication: | Acta Crystallographica Section C-Crystal Structure Communications |
| Publisher: | Blackwell Publishing |
| Additional Information: | Copyright of this article belongs to Blackwell Publishing |
| Keywords: | Crystallography |
| Department/Centre: | Division of Chemical Sciences > Solid State & Structural Chemistry Unit |
| Date Deposited: | 09 Feb 2009 09:56 |
| Last Modified: | 09 Feb 2009 09:56 |
| URI: | http://eprints.iisc.ac.in/id/eprint/18753 |
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