catena-Poly[[bis­[μ-2-(3-pyrid­yl)-1H-benzimidazole]-κ(2) N (2):N (3);κ(2) N (3):N (2)-disilver(I)]-μ-2,5-dicarboxy­benzene-1,4-dicarboxyl­ato-κ(2) O (2):O (5)]

The title coordination polymer, [Ag(2)(C(10)H(4)O(8))(C(12)H(9)N(3))(2)](n), was prepared by a hydro­thermal method. The Ag(I) atom exists in a strongly distorted trigonal coordination environment. Two Ag(I) ions related by an inversion centre are coordinated by two 2-(3-pyrid­yl)benzimidazole ligands, forming a centrosymmetric cyclic dimer. The bridging bidentate 2,5-dicarboxy­benzene-1,4-dicarboxyl­ate ligand is also located on an inversion centre and connects the binuclear units, generating a one-dimensional polymer. The almost-planar conformation of this ligand allows it to form a strong intra­molecular O—H⋯O hydrogen bond. Finally, inter­molecular N—H⋯O hydrogen bonds aggregate the chains into a three-dimensional framework.