metal-organic compounds
The principal building units in the title compound, [Co3(C9H3O6)2(C10H8N2)4(H2O)10]·C10H8N2·8H2O, are the linear centrosymmetric tricobalt(II) complex molecules resulting from two square-pyramidal [Co(btc)(bpy)(H2O)3]− entities (bpy is 4,4′-bipyridine and btc is the benzene-1,3,5-tricarboxylate trianion) bridged by one trans-[Co(bpy)2(H2O)4]2+ unit. The trinuclear complex molecules are assembled into infinite chains through intermolecular O—HN hydrogen bonds and π–π stacking interactions between adjacent monodentate bpy ligands. The chains and uncoordinated bpy molecules are further assembled into two-dimensional open layers, which are stacked in a staggered manner to give a three-dimensional supramolecular architecture with the solvent water molecules in the cavities.
metal-organic compounds
In the title compound, [CdCl2(C18H12N6)]·3H2O, the Cd atom has a distorted square-pyramidal coordination geometry. The solvent water molecules are hydrogen bonded to each other to form planar cyclic water hexamers, which, together with other hydrogen bonds, interlink the Cd complex molecules to give one-dimensional supramolecular ribbons that extend along the [111] direction. The chains are assembled into two-dimensional layers parallel to (111) by π–π stacking interactions. Furthermore, interlayer π–π stacking interactions and weak C—HCl hydrogen bonds complete the formation of a three-dimensional framework.