A novel five‐coordinate cadmium phenanthroline thiosulfate

The structure of the novel cadmium phenanthroline thio­sulfate poly­(1,10‐phenanthroline‐κ²N,N′)­cadmium(II)]‐μ₃‐thio­sulfato‐κ³S:S:O], Cd(S₂O₃)(C₁₂H₈N₂)]_n, with a pentacoordinated Cd centre, is reported. It forms linear chains built up around a 2₁ axis and is isostructural with the known bi­pyridine homologue. The structure is also compared with a previously reported closely related mono­aqua monohydrated phase, where the Cd²⁺ cation is hexacoordinated. The incidence of weak C—H⋯O interactions in the determination of its general packing properties is discussed.