Poly[[aqua­neodymium(III)]-μ₅-citrato]

The crystal structure of the title complex is composed of Nd^III cations, citrate trianions and water molecules, and is formulated as [Nd(C₆H₅O₇)(H₂O)]_n, isostructural with the lanthanum analogue [Baggio & Perec (2004). Inorg. Chem. 43, 6965–6968].

Poly­[[di­aqua(μ₆-1,3,5-benzene­tri­carboxyl­ato)­tricadmium(II)] dihydrate]

The title compound, {[Cd₃(C₉H₃O₆)₂(H₂O)₂]·2H₂O}_n, consists of a three-dimensional channel-like network. The asymmetric unit contains two crystallographically independent Cd^II ions, one of which shows a distorted trigonal prismatic coordination provided by six O atoms from one bidentate and three monodentate carboxyl­ate groups, and one water mol­ecule. The second independent Cd^II ion, which lies on an inversion centre, displays a distorted octahedral coordination environment provided by six O atoms from four monodentate carboxyl­ate groups and two water mol­ecules.

(2,2'-Bi­pyridine)­bis­(hydrogen isophthalato)­zinc(II)

In the title compound, [Zn(C₈H₅O₄)₂(C₁₀H₈N₂)], the Zn^II ion is located on a crystallographic twofold axis, which passes through the mid-point of the C-C bond of the bpy ligand. The Zn atom is four-coordinated by two carboxyl­ate O atoms from two symmetry-related hydrogen isophthalate ligands [Zn-O = 1.972 (5) Å] and two N atoms from 2,2'-bi­pyridine ligand [Zn-N = 2.067 (5) Å] to furnish a distorted tetrahedral geometry.

1,3-Bis­(pyrimidin-2-yl­sulfanyl)­propan-2-one

The title compound, C₁₁H₁₀N₄OS₂, has a twofold axis passing through the carbonyl group. The mol­ecules stack along the b axis via π–π interactions.

Tetra­aqua­bis(4,6-dioxidopyrimidin-1-ium-κ³N)cobalt(II)

In the title complex, [Co(C₄H₃N₂O₂)₂(H₂O)₄], the central Co^II ion is located at an inversion centre and is coordinated by two N atoms from 4,6-dihydroxy­pyrimidine ligands and four O atoms from water mol­ecules in an approximately octa­hedral geometry. This discrete structure is further extended into a three-dimensional supramolecular structure via weak hydrogen bonds.

catena-Poly[[dimethyl­tin(IV)]-μ-benzene-1,4-dicarboxyl­ato]

In the title compound, [Sn(CH₃)₂(C₈H₄O₄)], the coordination geometry around the Sn^IV centre can be described as highly distorted octa­hedral. The chelating benzene-1,4-dicarboxyl­ate ligands connect the centres to form an infinite one-dimensional polymeric chain structure.

Naphthalene-1,4,5,8-tetra­carboxylic 1,8-anhydride

In the title compound, C₁₄H₆O₇, strong O—H...O hydrogen-bonding inter­actions between the mol­ecules result in a one-dimensional chain-like supramolecular structure.