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The title coordination polymer, {[Ag 4 (C 7 H 4 O 6 S) 2 (C 4 H 4 N 2 ) 3 (H 2 O) 2 ]·2H 2 O}  n  , contains two independent Ag I  ions. One Ag I  ion is coordinated by one O atom from a 3-carboxyl­ato-4-hy­droxy­benzene­sulfonate ( L ) ligand, two N atoms from two pyrazine ligands and a water mol­ecule. The other Ag I  ion is coordinated by two O atoms from two  L  ligands and one N atom from a pyrazine ligand. One of the pyrazine ligands lies on an inversion center. The  L  and pyrazine ligands link the Ag I  ions into polymeric layers parallel to the  ac  plane. The layers are connected by inter­molecular O—H⋯O hydrogen bonds. An intra­molecular O—H⋯O hydrogen bond is also present in the  L  ligand.

Poly[[diaquabis(μ3-3-carboxylato-4-hydroxybenzenesulfonato)tri-μ2-pyrazine-tetrasilver(I)] dihydrate]

Poly[[diaquabis(μ₃-3-carboxylato-4-hydroxybenzenesulfonato)tri-μ₂-pyrazine-tetrasilver(I)] dihydrate]