(E)-N′-[2-(4-Chloro-3-nitrophenylsulfonyloxy)-3-methoxybenzylidene]isonicotinohydrazide acetic acid tetrasolvate

Abstract

In the title compound, C20H15ClN4O7S·4CH3COOH, the central o-vanillin group makes dihedral angles of 9.50 (11) and 42.86 (7)°, respectively, with its attached pyridine and nitrobenzene rings. The crystal packing is stabilized by N—H...O, O—H...O and O—H...N hydrogen bonds and C—H...O interactions, leading to an infinite three-dimensional network. A short intramolecular C—H...O contact is also seen.