title: 4-Meth-oxy-benzamidinium chloride monohydrate.
abstract: In the cation of the title compound, C(8)H(11)N(2)O(+)·Cl(-)·H(2)O, the C-N bonds of the amidinium group are identical within experiemental error [1.305 (2) and 1.304 (2) Å], and its plane forms a dihedral angle of 25.83 (8)° with the phenyl ring. The ionic components are associated in the crystal into polymeric hydrogen-bonded supra-molecular tapes stabilized by N-H(+)⋯Cl(-) and N-H(+)⋯Ow inter-molecular hydrogen bonds, and by Ow-H⋯Cl(-) inter-actions.
authors.affiliation: Chemistry Department, "Sapienza" University of Rome, P.le A. Moro, 5, I-00185 Rome,  Italy.
authors.forename: Simona
authors.initials: S
authors.lastname: Irrera
authors.forename: Gustavo
authors.initials: G
authors.lastname: Portalone