A two-dimensional cobalt(II) coordination polymer: poly[chloro(μ-imidazole-1,3-diyldiacetato-κ4O:O′:O′′:O′′′)cobalt(II)]

In the title coordination polymer, [Co(IDA)Cl]n (IDA− is the imidazolyl-1,3-diyldiacetate anion, C7H7N2O4), each Co2+ cation has an octa­hedral geometry, defined by four O atoms from four different IDA− anions and two Cl− anions. The IDA− anion serves as a bridging ligand to link the Co2+ cations into a two-dimensional layer structure. The Co atom lies on a centre of symmetry. The Cl atom and one CH group of the imidazole ring lie on twofold rotation axes.