title: Tetra-kis[diamminesilver(I)] bis-(2-hy-droxy-5-methyl-benzene-1,3-disulfonate) monohydrate.
abstract: In the crystal structure of the title salt, [Ag(NH(3))(2)](4)(C(7)H(6)O(7)S(2))(2)·H(2)O, the four independent Ag(I) complex cations all lie on special positions of m site symmetry, as do the two independent 2-hy-droxy-5-methyl-benzene-1,3-disulfonate anions. The Ag(I) cations exist in an almost linear coordination geometry [N-Ag-N = 175.2 (2), 178.08 (16), 175.8 (2) and 178.20 (19)°]. The water mol-ecule is disordered about a mirror plane. Two independent complex cations are linked by an Ag⋯Ag inter-action of 3.3151 (1) Å, furnishing a linear [Ag(NH(3))(2)](n) polycationic chain running along b. The free complex cations, polycationic chain and 2-hy-droxy-5-methyl-benzene-1,3-disulfonate anions inter-act via N-H⋯O and O-H⋯O hydrogen bonds, forming a three-dimensional network.
authors.forename: Li-Wei
authors.initials: LW
authors.lastname: Zhang
authors.forename: Shan
authors.initials: S
authors.lastname: Gao
authors.forename: Seik Weng
authors.initials: SW
authors.lastname: Ng