Key indicatorsSingle-crystal X-ray study T = 296 K Mean (C-C) = 0.002 Å R factor = 0.038 wR factor = 0.116 Data-to-parameter ratio = 13.6For details of how these key indicators were automatically derived from the article, see

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The molecule of the title compound, C15H12F3NO, is not planar and the dihedral angle between the planes of the two aromatic rings is 33.82 (11)°. The molecule exists in the phenol–imine tautomeric form, with a strong intramolecular O—H...N hydrogen bond [N...O = 2.609 (3) Å].

Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.002 Å; R factor = 0.041; wR factor = 0.117; data-to-parameter ratio = 14.7.The title compound, C 15 H 15 NO, adopts the enol-imine tautomeric form. There are two independent molecules in the asymmetric unit, with the two aromatic rings inclined at 14.94 (9) and 26.53 (5) . The structure is stabilized by O-HÁ Á ÁN intermolecular hydrogen bonds and C-HÁ Á Á interactions.

A new 1,2,4-triazole derivative, 3-phenyl-5-p-tolyl-4-(3,4,5-trimetoxy benzilideneamino)-4H-1,2,4-triazole, C 25 H 24 N 4 O 3 (1), has been prepared by the reaction of 4-amino3-phenyl-5-p-tolyl-4H-1,2,4-triazole and 3,4,5-trimetoxybenzaldehyde and structurally characterized by single crystal X-ray diffraction. Compound (1) crystallizes in the monoclinic space group P2 1 /c with a = 12.4336(11), b = 12.5860(11), c = 14.3944(14)Å, β = 94.417 (7) o , Z = 4, V = 1.267 Å 3. In the solid state, the molecules of (I) are discrete and not planar, comprising a twisted four-ring system. The molecules are held together with van der Waal's interactions.