In the centrosymmetric polymeric title compound, {[CoEr2(C 14H8N2O5)4(H 2O)4]·4H2O}n , the Er III cation has a coordination number of eight and is surrounded by seven carboxylate O atoms from four 5-(pyridine-4-carboxamido)-isophthalate (L) ligands and one water molecule, forming a distorted square-antiprismatic arrangement. The CoII cation is located on an inversion center and is coordinated by two pyridine N atoms, two carboxylate O atoms and two water molecules in a distorted octahedral geometry. The asymmetric unit contains two anionic L l...
