Bis(3-phenylpropylammonium) dichromate (VI): Synthesis, crystal structure and spectroscopy studies

The structure of bis(3-Phenylpropylammonium) dichromate(VI) was determined from X-ray diffraction data. The compound crystallizes in the monoclinic system (space group P21/c) with the lattice parameters: a = 7.9379(2) Å, b = 36.2439(16) Å, c = 7.5753(3) Å; B = 96.069(2); V= 2167.20(14) Å3 and Z = 4. The structure was solved from 4959 independent reflections with R = 0.043 and Rw = 0.105. The structure consists of discrete dichromate anions (Cr2O72-) with eclipsed conformation stacked in layers parallel to (a, c) plane at y = 0 and ½. These anions are linked via the 3-phenylpropylammonium cations by N—H…O and C—H…O hydrogen bonds, forming a two-dimensional supramolecular network. Crystal structure and spectroscopic studies are reported for the bis(3-phenylpropylammonium) dichromate(VI)

1,4,8,11-Tetra­azoniacyclo­tetra­decane tetra­chloridocobaltate(II) dichloride

The asymmetric unit of the title compound, (C10H28N4)[CoCl4]Cl2, contains two half-mol­ecules of the macrocycle, which are both completed by crystallographic inversion symmetry. In the dianion, the Co2+ cation is tetra­hedrally coordinated by four Cl atoms; the Co—Cl bond lengths correlate with the number of hydrogen bonds that the chloride ions accept. The crystal cohesion is supported by electrostatic inter­actions which, together with numerous N—H⋯Cl, N—H⋯(Cl,Cl) and C—H⋯Cl hydrogen bonds, lead to a three-dimensional network

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

1-Phenyl­piperazine-1,4-diium bis­(hydrogen sulfate)

In the title compound, C10H16N2 2+·2HSO4 −, the S atoms adopt slightly distorted tetra­hedral geometry and the diprotonated piperazine ring adopts a chair conformation. In the crystal, the 1-phenyl­piperazine-1,4-diium cations are anchored between chains formed by the sulfate entities via inter­molecular bifurcated N—H⋯(O,O) and weak C—H⋯O hydrogen bonds. These hydrogen bonds contribute to the cohesion and stability of the network of the crystal structure

Bis(2,3-dimethyl­anilinium) dihydrogen­diphosphate

In the title compound, 2C8H12N+·H2P2O7 2−, the complete dihydrogendiphosphate anion is generated by crystallographic twofold symmetry, with the bridging O atom lying on the rotation axis [P—O—P = 135.50 (9)°]. In the crystal, the 2,3-xylidinium cations are anchored between ribbons formed by the H2P2O7 entities. 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