4-[(Z)-(2-Ethoxy-4-oxochroman-3-ylidene)methylamino]benzenesulfonamide monohydrate

Abstract

In the molecule of the title compound, C18H18N2O5S·H2O, the heterocyclic ring adopts a twisted conformation, while the aromatic rings are oriented at a dihedral angle of 45.46 (3)°. Intramolecular C—H...O and N—H...O interactions result in the formations of planar five- and six-membered rings. In the crystal structure, N—H...O hydrogen bonds link the NH2 and SO2 groups through R22(8) ring motifs, while C—H...O and N—H...O hydrogen bonds result in the formation of R21(7) ring motifs. N—H...O and O—H...O hydrogen bonds link the uncoordinated water molecules, forming a polymeric network. A weak C—H...π interaction is also present.