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

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—H...O, O—H...N and O—H...O hydrogen bonds.