Poly[diaqua-(μ-5-1H-imidazole-4,5-di-carboxyl-ato) (μ4-1H-imidazole-4,5-di-carboxyl-ato)tris-ilver(I)ytterbium(III)]

Abstract

The asymmetric unit of the title compound, [Ag3Yb(C 5HN2O4)2(H2O)2] n , contains three AgI ions, one YbIII ion, two imidazole-4,5-dicarboxyl-ate ligands and two coordinating water mol-ecules. The YbIII atom is eight-coordinated, in a bicapped trigonal prismatic coordination geometry, by six O atoms from three imidazole-4,5-dicarboxyl-ate ligands and two coordinating water mol-ecules. The two-coordinated Ag I ions exhibit three types of coordination environments. One Ag I atom is bonded to two N atoms from two different imidazole-4,5-dicarboxyl-ate ligands. The other two AgI atoms are each coordinated by one O atom and one N atom from two different imidazole-4,5-dicarboxyl-ate ligands. These metal coordination units are connected by bridging imidazole-4,5-dicarboxyl-ate ligands, generating a two-dimensional heterometallic layer. These layers are stacked along the a axis via O-H⋯O hydrogen-bonding inter-actions to generate a three-dimensional framework.