title: 1-(4-Carb-oxy-phen-yl)-1H-imidazol-3-ium chloride dihydrate.
abstract: In the crystal structure of the title compound, C(10)H(9)N(2)O(2) (+)·Cl(-)·2H(2)O, the components are linked by O-H⋯O, N-H⋯O, O-H⋯Cl and N-H⋯Cl hydrogen bonds. In the cation, the imidazole ring is oriented at a dihedral angle of 13.67 (17)° with respect to the benzene ring. In the crystal, π-π stacking occurs between nearly parallel benzene rings, which are oriented at a dihedral angle of 3.4 (1)°, the centroid-centroid distance being 3.798 (3) Å.
authors.affiliation: Department of Chemistry, Anhui University, Key Laboratory of Functional Inorganic Materials Chemistry, Hefei 230039, People's Republic of China.
authors.forename: Zhi-Peng
authors.initials: ZP
authors.lastname: Yu
authors.forename: Wen-Qian
authors.initials: WQ
authors.lastname: Geng
authors.forename: Lin
authors.initials: L
authors.lastname: Kong
authors.forename: Hong-Ping
authors.initials: HP
authors.lastname: Zhou