title: 3-(2-Methyl-1,3-benzo-thia-zol-3-ium-3-yl)propane-1-sulfonate monohydrate.
abstract: In the title hydrated zwitterion, C11H13NO3S2·H2O, the N-C-C-C and C-C-C-S torsion angles in the side-chain are 171.06 (14) and 173.73 (12)°, respectively. In the crystal, inversion-related mol-ecules are π-stacked with an inter-planar separation of 3.3847 (2) Å. O-H⋯O hydrogen bonds link inversion-related mol-ecules with a pair of water mol-ecules to form R 4 (2)(8) rings. The closest S⋯S contact is 3.4051 (15) Å between inversion-related mol-ecules.
authors.affiliation: Deparment of Chemistry, Anhui University, Hefei 230039, People's Republic of China, Key Laboratory of Functional Inorganic Materials, Chemistry, Hefei 230039, People's Republic of China.
authors.forename: Guo-Cui
authors.initials: GC
authors.lastname: Zhang
authors.affiliation: Deparment of Chemistry, Anhui University, Hefei 230039, People's Republic of China, Key Laboratory of Functional Inorganic Materials, Chemistry, Hefei 230039, People's Republic of China.
authors.forename: Ming
authors.initials: M
authors.lastname: Kong
authors.affiliation: Deparment of Chemistry, Anhui University, Hefei 230039, People's Republic of China, Key Laboratory of Functional Inorganic Materials, Chemistry, Hefei 230039, People's Republic of China.
authors.forename: Sheng-Li
authors.initials: SL
authors.lastname: Li