S. Abid

Poly[bis­(piperazine-1,4-diium) [(μ4-cyclo-hexa­phosphato)dilithium] tetra­hydrate]

In the title compound, {(C4H12N2)2[Li2(P6O18)]·4H2O}n, the phosphate ring anion, located around an inversion center, adopts a chair conformation. Adjacent P6O18 rings are linked via corner-sharing by LiO4 tetrahedra, generating anionic porous {[Li2(P6O18)]4−}n layers parallel to (101). The piperazine-1,4-diium cations occupy the pores and develop hydrogen bonds with the inorganic framework. An extensive network of N—H⋯O and O—H⋯O hydrogen-bonding interactions link the components into a three-dimensional network and additional stabilization is provided by weak C—H⋯O hydrogen bonds.

The one-dimensional coordination polymer poly[tetra­kis­[(4-chloro­phen­yl)methanaminium] [cadmate-μ-cyclo­hexa­phospho­rato]]

Cyclohexaphosphoric acid (P6O18H6) reacts with cadmium carbonate and 4-chlorobenzylamine (CBA) to give the mononuclear title complex, (C7H9ClN)4[Cd(P6O18)]n, in which the CdII atom, lying on an inversion centre, has an octahedral coordination built of six O atoms of two centrosymmetric P6O18 rings. Each P6O18 ligand acts as a bridge, linking two CdII atoms and forming an anionic coordination polymer [Cd(P6O18)4−]n extending along [010]. Adjacent polymeric chains are connected through N—H⋯O and C—H⋯O hydrogen bonds, generating a three-dimensional supramolecular network.

Bis(4-chloro­benzyl­ammonium) tetra­kis(2,6-diethyl­anilinium) cyclo­hexa­phosphate tetra­hydrate

In the crystal of the title hydrated molecular salt, 2C7H9ClN+·4C10H16N+·P6O18 6−·4H2O, the packing consists of a three-dimensional O—H⋯O and N—H⋯O hydrogen-bonded network resulting from the association of anionic layers built up from centrosymmetric cyclohexaphosphate ions and water molecules and the two types of organic cations.

A Cadmium Coordination Polymer Based on Phosphate Clusters: Synthesis, Crystal Structure, Electrochemical Investigation and Antibacterial Activity

Abstract A new d10 coordination polymer,

Dilithium disodium nickel(II) cyclo­hexa­phosphate dodeca­hydrate, Li2Na2NiP6O18·12H2O

\left\{ {\left( {{\text{C}}_{5} {\text{H}}_{14} {\text{N}}_{2} } \right)_{2} \left[ {{\text{Cd}}\left( {\left( {{\text{P}}_{6} {\text{O}}_{18} } \right)\left( {{\text{H}}_{2} {\text{O}}} \right)_{2} } \right)} \right] \cdot 6{\text{H}}_{2} {\text{O}}} \right\}_{n}

5-Chloro-2-methoxy-anilinium nitrate.

C5H14N22CdP6O18H2O2·6H2On, was prepared and characterized by X-ray diffraction, IR-Raman spectroscopy, thermal analysis and cyclic voltammetry. The crystal structure determination reveals that the phosphate anions alternate with the cadmium octahedral to form an anionic coordination polymer extending along [001] direction. The double protonated homopiperazine cations and the water molecules ensure the interconnection between polymers and thus giving rise to three dimensional supramolecular networks. By means of cyclic voltammetry, it is shown that whilst the reduction of the complexed Cd2+ occurs with a biggest difficulty than this of its free form, the anodic oxidation of the heterocyclic N donor piperazine became quite easy, when it is displayed as a counterpart diprotonated cation, between the anionic layers of

Synthesis, crystal structure and characterization of a new organic–inorganic hybrid material: [C6H16N2O]SbCl5

\left[ {{\text{Cd}}({\text{P}}_{6} {\text{O}}_{18} )({\text{H}}_{2} {\text{O}})_{2} )} \right]_{\text{n}}^{{4{\text{n}} - }}