Poly[[μ-aqua-triaqua[μ6-1,3,4,6-tetrakis(carboxylatomethyl)-7,8-diphenylglycoluril]dizinc] monohydrate]

Abstract

In the crystal structure of the title coordination polymer, {[Zn2(C24H18N4O10)(H2O)4]·H2O}n, the molecular building block (MBB), viz [Zn2(CO2)4(H2O)4], comprises two ZnII cations, each bridged by three carboxylate groups from different ligand molecules. These two ZnII cations exhibit different coordination environments: a distorted trigonal–pyramidal coordination, as an intermediate, is formed by the two coordinated water molecules and three carboxylate groups, and a distorted octahedral geometry defined by three water molecules and three carboxylate groups, in which two carboxylate groups from the same side of the clip glycoluril ring and one water molecule are bidentate bridging, whereas others are monodentate units. Every ligand molecule connects four MBBs, thus forming a three-dimensional structure. Extensive intra- and intermolecular O—H...O hydrogen bonding is observed.