Poly[tetra-deca-aqua-Tetrakis-( 3-imidazole-4,5-dicarboxyl-ato) hexa- 3-sulfato-cobalt(II)hexa-samarium(III)]

Abstract

In the title three-dimensional compound, [CoSm6(C5H2N2O4)4(SO4)6(H2O)14] n , the Co II ion is six-coordinated with two O atoms and two N atoms from two imidazole-4,5-dicarboxylate ligands and two coordinated water molecules, giving a slightly distorted octa-hedral geometry. One Sm III ion is eight-coordinated in a bicapped trigonal-prismatic coordination geometry by four O atoms from two imidazole-4,5-dicarboxylate ligands, two O atoms from two SO4 2- anions and two coordinated water molecules. The other two Sm III ions are nine-coordinated in a tricapped trigonal-prismatic coordination geometry; one of these Sm III ions is bonded to four O atoms from two imidazole-4,5- dicarboxylate ligands, three O atoms from three SO4 2- anions and two water O atoms, and the other Sm III ion is coordinated by one O atom and one N atom from one imidazole-4,5-dicarboxylate ligand, five O atoms from three SO4 2- anions, as well as two coordinated water molecules. The crystal structure is further stabilized by N - H⋯O, O - H⋯O, and C - H⋯O hydrogen-bonding interactions.