Poly[tetra-μ-aqua-diaqua-tetra-kis-[μ-(E)-2-nitro-cinnamato]tetra-rubidium]

Poly[μ5-{hydrogen bis-[(E)-cinnamato]}-caesium]

In the structure of the title polymeric complex, [Cs(C₉H₇O₂)(C₉H₈O₂)]_n, a caesium salt of trans-cinnamic acid, the Cs⁺ ions of the two individual irregular CsO₈ coordination polyhedra lie on twofold rotation axes and are linked by four bridging carboxyl O-atom donors from two cinnamate ligand species. These two ligand components are inter­linked through a delocalized H atom within a short O⋯H⋯O hydrogen bond. Structure extension gives a two-dimensional coordination polymer which lies parallel to (001). The structure was determined from a crystal twinned by non-merohedry, with a twin component ratio of approximately 1:1.