4‐(4‐Fluoro‐3‐phenoxyphenyl)‐6‐(4‐fluorophenyl)‐2‐oxo‐1,2‐dihydropyridine‐3‐carbonitrile and the 6‐(4‐methylphenyl)‐ analogue |
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Authors: | Deepak Chopra T P Mohan B Vishalakshi T N Guru Row |
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Abstract: | 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?π interactions, revealing the importance of such weak interactions when present alongside N—H?O and C—H?O hydrogen bonds. The dihedral angle between the planes of the 4‐fluorophenyl ring and the pyridine ring is 26.8 (1)° in (I), while that between the planes of the 4‐methylphenyl and pyridine rings is 29.5 (1)° in (II). |
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