Crystal structure of catena-poly[[aqua(2,2′:6′,2′′-terpyridine-κ(3) N,N′,N′′)cobalt(II)]-μ-cyanido-κ(2) N:C-[dicyanidoplatinum(II)]-μ-cyanido-κ(2) C:N]

The title compound, [Co(C(15)H(11)N(3))(H(2)O){Pt(CN)(4)}](n), is a one-dimensional coordination polymer formed under hydro­thermal reaction conditions. The Co(II) site has sixfold coordination with a distorted octa­hedral geometry, while the Pt(II) ion is coordinated by four cyanide groups in an almost regular square-planar geometry. The compound contains twofold rotation symmetry about its Co(II) ion, the water molecule and the terpyridine ligand, and the Pt(II) atom resides on an inversion center. trans-Bridging by the tetra­cyanidoplatinate(II) anions links the Co(II) cations, forming chains parallel to [-101]. Additionally, each Co(II) 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) Å]. No Pt⋯Pt inter­actions are observed in the structure.