Crystal structure of catena-poly[[aqua(2,2′:6′,2′′-terpyridine-κ3N,N′,N′′)cobalt(II)]-μ-cyanido-κ2N:C-[dicyanidoplatinum(II)]-μ-cyanido-κ2C:N]

The title compound, [Co(C15H11N3)(H2O){Pt(CN)4}]n, is a one-dimensional coordination polymer formed under hydro­thermal reaction conditions. The CoII site has sixfold coordination with a distorted octa­hedral geometry, while the PtII ion is coordinated by four cyanide groups in an almost regular square-planar geometry. The compound contains twofold rotation symmetry about its CoII ion, the water molecule and the terpyridine ligand, and the PtII atom resides on an inversion center. trans-Bridging by the tetra­cyanidoplatinate(II) anions links the CoII cations, forming chains parallel to [-101]. Additionally, each CoII atom is coordin­ated by one water mol­ecule and one tridentate 2,2′:6′,2′′-terpyridine ligand. O—H⋯N hydrogen-bonding inter­actions are found between adjacent chains and help to consolidate the crystal packing. In addition, relatively weak π–π stacking inter­actions exist between the terpyridine ligands of adjacent chains [inter­planar distance = 3.464 (7) A]. No Pt⋯Pt inter­actions are observed in the structure.