Poly[bis(μ2-4-pyridinecarboxylato-κ3N:O,O′)cobalt(II)]: a triply interpenetrated structure with diamonoid topology

The binary title complex, [Co(C6H4NO2)2]n, is a three-dimensional coordination polymer that is triply inter­penetrated with diamonoid topology. The asymmetric unit comprises half a Co atom, which lies on a twofold axis, and a 4-pyridine­carboxyl­ate anion, in a general position. The Co atom is in a distorted cis-N2O4 octa­hedral geometry defined by two chelating carboxyl­ate groups and two pyridyl N atoms.