In the title compound, C21H21NO, the dihedral angle between the naphthalene ring system and the benzene ring is 64.61 (6)°. The molecular structure is stabilized by an intramolecular C—H⋯N hydrogen bond.
The title compound, C19H14F3NO2, crystallizes in the keto–amine tautomeric form, with a strong intramolecular N—H⋯O hydrogen bond. The molecule is almost planar; the dihedral angle between the naphthalene ring system and the benzene ring is 4.60 (7)°. In the crystal, molecules are linked into chains along the c axis by C—H⋯O hydrogen bonds. The F atoms of the trifluoromethyl group are disordered over two positions with refined site occupancies of 0.668 (9) and 0.332 (9).
The title compound, C18H11BrF3NO2, crystallizes in the phenol–imine tautomeric form, with a strong intramolecular O—H⋯N hydrogen bond. The dihedral angle between the naphthalene ring system and the benzene ring is 28.54 (10)°.
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