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In the title compound, C22H23F2N3O2, the bicyclic ring system exists in a twin-chair conformation with an equatorial disposition of the 4-fluoro-phenyl groups on the heterocycle. These aromatic rings are inclined to one another by 19.4 (1)°. In the crystal, mol-ecules are linked by pairs of N-H⋯O and C-H⋯O hydrogen bonds into inversion dimers, incorporating R 1 (2)(7) and R 2 (2)(8) ring motifs; the same O atom accepts both hydrogen bonds. These dimers are further linked by a pair of C-H⋯F hydrogen bonds, enclosing R 2 (2)(28) ring motifs, forming supra-molecular chains along [010]. The NH group of the pyridine ring is not involved in hydrogen bonding, probably due to the steric hindrance of the fluoro-phenyl groups.

Crystal structure of methyl 2-[2,4-bis(4-fluorophenyl)-3-azabicyclo[3.3.1]nonan-9-ylidene]hydrazinecarboxylate