One‐dimensional zinc‐based coord­in­ation polymers incorporating cyanate anions

Two one‐dimensional zinc‐based coordination polymers containing cyanate anions are reported. catena‐Polysodium tricyanato­zinc(II)]‐μ‐1,4‐diaza­bicyclo­2.2.2]octane‐κ²N:N′]], {NaZn(NCO)₃(C₆H₁₂N₂)]}_n, consists of linear tricyanato­zinc(II)]‐μ‐1,4‐diaza­bicyclo­2.2.2]octane strands in which the Zn²⁺ cations adopt trigonal–bipyramidal coordination on sites of m2 point symmetry. Na⁺ cations lie between the strands on sites of m point symmetry, coordinated in a distorted octa­hedral geometry by six O atoms of the cyanate anions. catena‐Polydicyanato­zinc(II)]‐μ‐4,4′‐bipyridine‐κ²N:N′], Zn(NCO)₂(C₁₀H₈N₂)]_n, crystallizes in the space group P2₁/n with Z′ = 5. The structure consists of zigzag strands formed by Zn²⁺ cations linked via 4,4′‐bipyridine. Each Zn²⁺ cation adopts a tetra­hedral coordination, with two sites occupied by 4,4′‐bipyridine and two cyanate anions completing the coordination sphere. The structure is closely comparable with the thio­cyanate and halide analogues ZnX₂(C₁₀H₈N₂)] (X = NCS, Cl or Br).