Ji-Wei Liu

Poly[μ7-sulfanediyldiacetato-disilver(I)]

In the title coordination polymer, [Ag₂(C₄H₄O₄S)], each AgI cation is four-coordinated by three of the four carboxylate O atoms and the S atom from symmetry-related sulfanediyldiacetate ligands, thus defining a distorted tetrahedral geometry at the metal centre. The AgI cations are bridged by sulfanediyldiacetate groups, leading to a two-dimensional layer structure. These layers are interconnected via Ag-S bonds to form a three-dimensional coordination polymer network overall.

The two-dimensional coordination polymer poly[diaqua(μ2-1H-imidazo[4,5-f][1,10]phenanthroline)-μ4-sulfato-μ3-sulfato-dicadmium(II)].

In the title coordination polymer, [Cd2(SO4)2(C13H8N4)(H2O)2]n, there are two crystallographically independent Cd(II) centres with different coordination geometries. The first Cd(II) centre is hexacoordinated by four O atoms of four sulfate ligands, one water O atom and one N atom of a 1H-imidazo[4,5-f][1,10]phenanthroline (IP) ligand, giving a distorted octahedral coordination environment. The second Cd(II) centre is heptacoordinated by four O atoms of three sulfate ligands, one water O atom and two N atoms of one chelating IP ligand, resulting in a distorted monocapped anti-trigonal prismatic geometry. The symmetry-independent Cd(II) ions are bridged in an alternating fashion by sulfate ligands, forming one-dimensional ladder-like chains which are connected through the IP ligands to form two-dimensional layers. These two-dimensional layers are linked by interlayer hydrogen bonds, leading to the formation of a three-dimensional supramolecular network.

catena-Poly[[[diaqua­bis(1H-indole-3-acetato-κO)cobalt(II)]-μ-4,4′-bipyridine-κ2N:N′] tetra­hydrate]

The 4,4′-bipyridine spacer in the title compound, [Co(C10H8NO2)2(C10H8N2)(H2O)2]·4H2O, links the diaquacobalt(II) dicarboxylate units into a linear chain; the metal atom lies on a center of inversion in an octahedral environment. The coordinated and uncoordinated water molecules interact through O—H⋯O hydrogen bonds to form a three-dimensional network.

Tetra­aqua­(1,10-phenanthroline-κ2N,N′)magnesium(II) bis­[(2,4-dichloro­phen­yl)acetate]

In the mononuclear title complex, [Mg(C12H8N2)(H2O)4](C8H5Cl2O2)2, each MgII ion is hexacoordinated by two N atoms from a 1,10-phenanthroline ligand [Mg—N = 2.233 (2) Å] and four water molecules [Mg—OW = 2.033 (2) and 2.043 (1) Å] in a distorted octahedral geometry. A twofold rotation axis passes through the Mg atom. In the crystal structure, the cations and anions are linked by intermolecular O—H⋯O hydrogen bonds and π–π stacking interactions [centroid–centroid distance = 3.804 (2) Å] into layers parallel to the ac plane.

Poly[bis­(μ2-benzyl­oxyacetato-κ3 O,O′:O′′)cadmium(II)]

The title cadmium derivative of benzyloxyacetic acid, [Cd(C9H9O3)2]n, exists as a μ 2-carboxylate-bridged layer network. Two benzyloxyacetate units each chelate the metal through a carboxylate as well as through the ether O atoms; the metal is also coordinated by the double-bond carbonyl O atom of two adjacent benzyloxyacetate units in an octahedral geometry. The metal atom lies on a special position of 2 site symmetry. The phenyl group is disordered equally over two positions.