title: 2-(4-Chloro-benzo-yl)-1-(diamino-methyl-ene)hydrazinium chloride monohydrate.
abstract: In the cation of the title compound, C(8)H(10)ClN(4)O(+)·Cl(-)·H(2)O, the guanidinium group is planar (maximum deviation = 0.0001 Å) and nearly perpendicular to carboxamide group, making a dihedral angle of 87.0 (3)°. The N atoms of the guanidine fragment have a planar trigonal configuration and the N atom of the carboxamide group adopts a pyramidal configuration. In the crystal structure, inter-molecular N-H⋯O, N-H⋯Cl and O-H⋯Cl hydrogen bonds link the cations, anions and water mol-ecules into layers parallel to the bc plane.
authors.forename: V M
authors.initials: VM
authors.lastname: Chernyshev
authors.forename: A V
authors.initials: AV
authors.lastname: Chernysheva
authors.forename: E V
authors.initials: EV
authors.lastname: Tarasova
authors.forename: V V
authors.initials: VV
authors.lastname: Ivanov
authors.forename: Z A
authors.initials: ZA
authors.lastname: Starikova