Poly[aqua­(μ(3)-2-hy­droxy-5-nitro­benzoato-κ(3) O (1):O (1′):O (2))rubidium]

In the structure of title compound, [Rb(C(7)H(4)NO(5))(H(2)O)](n), the centrosymmetric cyclic dimeric repeating unit comprises two irregular RbO(4) complex centres bridged by the carboxyl­ate groups of the 5-nitro­salicylate ligands. The coordination about each Rb atom is completed by a monodentate water mol­ecule and a phenolic O-atom donor which gives a bridging extension [Rb—O range = 3.116 (7)–3.135 (5) Å]. The polymeric structure is stabilized by inter­molecular water O—H⋯O(carboxyl­ate) hydrogen bonds and weak inter-ring π–π inter­actions [minimum ring centroid separation = 3.620 (4) Å]. An intramolecular O—H⋯O hydrogen bond between phenol and carboxylate groups is also present.