The crystal structure of the title compound, C8H12N+·Cl−·H2O, consists of hydro­phobic layers of dimethyl­anilinium cations parallel to the bc plane alternated by hydro­philic layers of chloride anions and water mol­ecules. The layers are linked by N—H⋯O and N—H⋯Cl hydrogen bonds involving the ammonium groups of the cations. The cohesion of the ionic structure is further stabilized by O—H⋯Cl hydrogen-bonding inter­actions.

Key indicators: single-crystal X-ray study; T = 100 K; mean (C-C) = 0.003 Å; R factor = 0.025; wR factor = 0.058; data-to-parameter ratio = 19.5.In the title compound, (C 7 H 10 NO) 2 [SnCl 6 ], the Sn IV atom, located on an inversion center, exists in an octahedral coordination environment. The crystal structure exhibits alternating organic and inorganic layers parallel to (101).

In the crystal of the title compound, C8H10NO2 +·Cl−, alternating layers of hydro­phobic and hydro­philic zones stack along the c axis. The chloride anions are sandwiched between the 4-(carboxy­meth­yl)anilinium layers, forming inter­molecular O—H⋯Cl and N—H⋯Cl hydrogen bonds with the ammonium and carboxyl groups of the cations. In addition, inter­molecular N—H⋯O and weak C—H⋯O and C—H⋯Cl hydrogen bonds help stabilize the crystal structure.