title: 6-Amino-9H-purine-1,7-diium bis-(4-methyl-benzene-sulfonate) monohydrate.
abstract: The asymmetric unit of the title compound, C(5)H(7)N(5) (2+)·2C(7)H(7)O(3)S(-)·H(2)O, consists of one diprotonated adeninium cation, two p-toluene-sulfonic acid anions and one water mol-ecule. In the crystal, the cations and anions are connected through N-H⋯O hydrogen bonds forming R(2) (2)(8) and R(2) (2)(9) graph-set motifs. The solvent water mol-ecule links cations and anions through O-H⋯O and N-H⋯O hydrogen bonds, generating a two-dimensional layer parallel to (10).
authors.forename: Zhi-Qiang
authors.initials: ZQ
authors.lastname: Xiong
authors.forename: Yun-Long
authors.initials: YL
authors.lastname: Ai
authors.forename: Hui-Liang
authors.initials: HL
authors.lastname: Wen