Poly[dipotassium [(μ(6)-2,2′,2′′,2′′′-{[pyrazine-2,3,5,6-tetra­yltetra­kis­(methyl­ene)]tetra­kis­(sulfanedi­yl)}tetra­acetato)­disilver(I)] 5.2-hydrate]

The reaction of AgNO(3) with the ligand 2,2′,2′′,2′′′-{[pyrazine-2,3,5,6-tetra­yltetra­kis­(methyl­ene)]tetra­kis­(sulfanedi­yl)}tetra­acetic acid in the presence of a potassium acetate buffer lead to the formation of a silver(I)–potassium–organic framework, poly[dipotassium [(μ(6)-2,2′,2′′,2′′′-{[pyrazine-2,3,5,6-tetra­yltetra­kis(methyl­ene)]tetra­kis­(sulfanedi­yl)}tetra­acetato)­disilver(I)] 5.2-hydrate], {K(2)[Ag(2)(C(16)H(16)N(2)O(8)S(4))]·5.2H(2)O}( n ), (I). The asymmetric unit is composed of half a binuclear silver complex located about a center of symmetry, a potassium cation and 2.6 disordered water mol­ecules. The whole binuclear silver complex is generated by inversion symmetry with the pyrazine ring being located about an inversion centre. The ligand coordinates in a bis-tetra­dentate manner. The binuclear silver complex anions are linked via bridging Ag⋯S⋯Ag zigzag bonds, forming a network lying parallel to the bc plane. The networks are linked by O(carboxyl­ate)⋯K (+)⋯O(carboxyl­ate) bridging bonds to form a framework. The disordered water mol­ecules are present near to the K(+) cations. [Image: see text]