Poly[[nonaaquabis(μ-5-hydroxybenzene-1,3-dicarboxylato) (5-hydroxybenzene-1,3-dicarboxylato)dicerium(III)] hexahydrate]

Abstract

In the title coordination polymer, {[Ce2(C8H 4O5)3(H2O)9] ·6H2O}n, the asymmetric unit is formed by two CeIII atoms, three 5-hydroxybenzene-1,3-dicarboxylate ligands, nine coordinating water molecules and six water molecules of crystallization. The two CeIII atoms are bridged by 5-hydroxybenzene-1,3-dicarboxylate ligands acting in a bis-bidentate coordination mode, generating infinite chains along [101]. Both independent metal atoms are nine-coordinated, one by four O atoms from the carboxylate groups of two bridging 5-hydroxybenzene-1,3- dicarboxylate ligands and five O atoms from water molecules, generating a tricapped trigonal-prismatic geometry. The coordination around the second CeIII atom is similar, except that one of the water molecules is replaced by an O atom from an additional 5-hydroxybenzene-1,3-dicarboxylate ligand acting in a monodentate coordination mode and forming a capped square-antiprismatic geometry. © 2014 CrossMark.