Acta Cryst. (2005). E61, o4169-o4170  [ doi:10.1107/S1600536805037165 ]

4-{[(1E)-(3,5-Dibromo-2-hydroxyphenyl)methylene]amino}-1,5-dimethyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one

L. Huang and D.-B. Chen

Abstract: The crystal structure of the title compound, C₁₈H₁₅Br₂N₃O₂, shows a strong intramolecular O-HN hydrogen bond [NO = 2.609 (4) Å, O-H = 0.90 Å, HN = 1.80 Å and O-HN = 148°], which leads to the existence of a phenol-imine tautomer.

Online 19 November 2005

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