title: 7-Chloro-4-[(E)-2-(4-methoxy-benzyl-idene)hydrazin-1-yl]quinoline monohydrate.
abstract: The organic mol-ecule in the title hydrate, C(17)H(14)ClN(3)O·H(2)O, has a small but significant twist from planarity, as seen in the dihedral angle of 12.10 (17)° between the quinoline and benzene rings. The conformation about the C=N bond is E. Chains along the b axis are formed in the crystal structure aided by water-quinoline O-H⋯N (× 2) and hydrazone-water N-H⋯O hydrogen bonds. Layers of these chains stack along the a axis via C-H⋯π and π-π inter-actions [ring centroid-ring centroid distance = 3.674 (2) Å]. C-H⋯O inter-actions are also present.
authors.forename: Marcelle
authors.initials: M
authors.lastname: de Lima Ferreira
authors.forename: Marcus V N
authors.initials: MV
authors.lastname: de Souza
authors.forename: R Alan
authors.initials: RA
authors.lastname: Howie
authors.forename: Edward R T
authors.initials: ER
authors.lastname: Tiekink
authors.forename: James L
authors.initials: JL
authors.lastname: Wardell
authors.forename: Solange M S V
authors.initials: SM
authors.lastname: Wardell