Mohamed Rzaigui

Tetra­kis(2-amino-5-chloro­pyridinium) di­hydrogen cyclo­hexa­phosphate

In the crystal structure of the title compound, 4C5H6ClN2 +·H2P6O18 4−, the [H2P6O18]4− anions are interconnected by O—H⋯O hydrogen bonds, leading to the formation of infinite ribbons extending along the a-axis direction. These ribbons are linked to the organic cations, via N—H⋯O and C—H⋯O hydrogen bonds, into a three-dimensional network. The six P atoms of the [H2P6O18]4− anion form a chair conformation. The complete cyclohexaphosphate anion is generated by inversion symmetry.

Hexa-kis-(3-chloro-2-methyl-anilinium) cyclo-hexa-phosphate dihydrate.

In the organic/inorganic salt hydrate, 6C7H9ClN+·P6O18 6−·2H2O, the cyclohexaphosphate anion resides on an inversion centre. The asymmetric unit consists of three cations, one half-anion and a water molecule. In the crystal, the water molecules and the [P6O18]6− anions are linked by O—H⋯O hydrogen bonds, generating infinite layers parallel to the ab plane. These layers are interconnected by the organic cations through N—H⋯O hydrogen bonds.

4-Methyl-benzyl-ammonium nitrate.

In the title salt, C8H12N+·NO3 −, the N atom of the 4-methylbenzylammonium cation is displaced by 1.366 (2) Å from the mean plane of the other atoms. In the crystal, the cations are connected to the anions by N—H⋯O and N—H⋯(O,O) hydrogen bonds, generating a layered network parallel to (100). A weak C—H⋯O interaction also occurs.

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.

Tetra­kis(3,5-xylidinium) dihydrogen cyclo­hexa­phosphate dihydrate

In the title compound, 4C8H12N+·H2P6O18 4−·2H2O, the complete cyclohexaphosphate anion is generated by inversion symmetry. Crystal cohesion and stability are supported by electrostatic interactions which, together with N—H⋯O and O—H⋯O hydrogen bonds, build up a three-dimensional 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.

1-Phenyl­piperazine-1,4-diium tetra­chlorido­cobalt(II)

In the title molecular salt, (C10H16N2)[CoCl4], the piperazine ring of the phenylpiperazine dication adopts a chair conformation and the phenyl ring occupies an equatorial orientation. In the tetrachloridocobaltate(II) dianion, the Co—Cl bond lengths for the chloride ions not accepting hydrogen bonds are significantly shorter than those for the chloride ions accepting such bonds. In the crystal, the components are linked by N—H⋯Cl hydrogen bonds, generating [001] chains.

2-Amino­pyrimidinium dihydrogen phosphate monohydrate

In the title compound, C4H6N3 +·H2O4P−·H2O, the pyrimidinium ring is essentially planar, with an r.m.s. deviation of 0.0016 Å. In the structure, pairs of symmetry-related anions are connected into centrosymmetric clusters via strong O—H⋯O hydrogen bonds forming six-membered rings with an R 2 2(6) motif. These clusters are interconnected via water molecules through OW—H⋯O hydrogen bonds, building an infinite layer parallel to the ab plane. Moreover, infinite chains of 2-aminopyrimidinium cations spread along the a-axis direction. These chains are connected to the inorganic layer through N—H⋯O, C—H⋯O and C—H⋯N hydrogen bonds, which, together with electrostatic and van der Waals interactions, contribute to the cohesion and stability of the network in the crystal structure.

Bis(oxonium) tetra­kis(o-toluidinium) cyclo­hexa­phosphate

In the title compound, 4C7H10N+·2H3O+·P6O18 6−, the complete cyclohexaphosphate anion is generated by crystallographic inversion symmetry. In the crystal, the H3O+ ions and the [P6O18]6− anions are linked by O—H⋯O hydrogen bonds, generating infinite layers lying parallel to the ab plane at z = 1/2. These layers are interconnected by the organic cations, which establish N—H⋯O hydrogen bonds with the [P6O18]6− anions.