catena-Poly[2-methyl-1H-imidazol-3-ium [(aquachloridocadmate)-di-μ-chlorido]]

The asymmetric unit of the title compound, {(C4H7N2)[CdCl3(H2O)]}n, contains one 1-methyl-1H-imidazol-3-ium cation, one CdII atom, three Cl atoms and one water molecule. Adjacent Cd ions are interconnected alternately by paired Cl− bridges to generate an infinite one-dimensional coordination chain along the b axis. In the chain, the crystallographically unique CdII atom, with a distorted octahedral geometry, is coordinated by five Cl− ions and one water molecule. Intra-chain O—H...Cl hydrogen bonding and N—H...Cl hydrogen bonding between the cations and the anionic chains consolidate the crystal packing