Catena-Poly[Ammonium (Cadmium-Tri-Mu-Thiocyanato-Kappa S-4: N;Kappa N-2:S)- 1,4,10,13,16-Hexaoxacyclooctadecane (1/1)]

In the title compound, {(NH(4))[Cd(NCS)(3)]·C(12)H(24)O(6)}(n), the Cd(2+) ion, the ammonium cation, one of the SCN(-) ligands and the macrocycle are located on mirror planes. The thiocyanate anions act as bridging ligands between the Cd(II) ions, leading to a polymeric chain arrangement extending along [001] around a twofold screw axis. The ammonium ions are contained within the bowl of the macrocycle via extensive N-H⋯O hydrogen bonding.