Poly[[tetraaquabis(μ3-imidazole-4,5-dicarboxylato)tetrakis(μ2-imidazole-4,5-dicarboxylato)tricobalt(II)dilutetium(III)] dihydrate]

Abstract

In the title compound, {[Co3Lu2(C5H2N2O4)6(H2O)4]·2H2O}n, the LuIII ions are seven-coordinated in a monocapped trigonal prismatic coordination geometry by six O atoms from three imidazole-4,5-dicarboxylate ligands and one water O atom. The CoII ions are six-coordinated in a slightly distorted octahedral geometry and exhibit two types of coordination environments. One CoII ion, located on an inversion center, is coordinated by two water O atoms as well as two O atoms and two N atoms from two imidazole-4,5-dicarboxylate ligands. The other CoII ion is bonded to four O atoms and two N atoms from four imidazole-4,5-dicarboxylate ligands. These metal coordination units are connected by bridging imidazole-4,5-dicarboxylate ligands, generating a three-dimensional network. The crystal structure is further stabilized by N—H...O, O—H...O, and C—H...O hydrogen-bonding interactions between the water molecules and the imidazole-4,5-dicarboxylate ligands.