Acta Cryst. (2008). E64, o690  [ doi:10.1107/S1600536808006193 ]

4-{[(1,3-Benzothiazolium-2-yl)hydrazono](phenyl)methyl}-3-methyl-1-phenyl-1H-pyrazol-5-olate monohydrate

Y.-F. Sun and Y.-P. Cui

Abstract: The title compound, C₂₄H₁₉N₅OS·H₂O, was synthesized by the reaction of 4-benzoyl-3-methyl-1-phenylpyrazol-5-one and 2-hydrazino-1,3-benzothiazole. Proton transfer leads to the formation of a zwitterionic structure and the molecule exists in the enolate form. The pyrazolone ring makes dihedral angles of 35.4 (3), 69.7 (3) and 40.1 (3)° with the 1-phenyl, indirectly bound phenyl and benzothiazole ring systems, respectively. The molecules are linked into one-dimensional chains by a combination of N-HO, O-HN and O-HO hydrogen bonds.

Online 12 March 2008

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