2-Amino-3-nitro­pyridinium hydrogen oxalate

In the non-centrosymetric title compound, C5H6N3O2 +·C2HO4 −, the hydrogen oxalate anions form corrugated chains parallel to the c axis, linked by O—H⋯O hydrogen bonds. The 2-amino-3-nitro­pyridinium cations are anchored between theses chains by N—H⋯O and C—H⋯O hydrogen bonds and van der Waals and electrostatic inter­actions, creating a three-dimensional network

2-Amino-5-nitro­pyridinium hydrogen selenate

There are two cations and two anions in the asymmetric unit of the title compound, C5H6N3O2 +·HSeO4 −. In the crystal, there are two independent chains of HSeO4 − anions running along the a axis, linked by O—H⋯O hydrogen bonds. Ribbons of cations linked by N—H⋯O hydrogen bonds run along the b-axis direction, and are further hydrogen bonded to the anions by N—H⋯O and C—H⋯O links, generating a three-dimensional network

Bis(2-methyl­anilinium) diaqua­bis[dihydrogendiphosphato(2−)]cobaltate(II)

In the title cobalt(II) complex with 2-methyl­anilinium and diphosphate, (C7H10N)2[Co(H2P2O7)2(H2O)2], a three-dimensional network is built up from anionic layers of [Co(H2P2O7)2(H2O)2]2− units and 2-methyl­anilinium cations located between these layers. The dihydrogendiphosphate groups present a bent eclipsed conformation, while the Co2+ ions lie on inversion centers. An intricate network of O—H⋯O and N—H⋯O hydrogen bonds is established between the different components, assuring the cohesion of the network with other inter­actions, being of electrostatic and van der Waals nature

2-Amino-3-nitro­pyridinium perchlorate

The title compound, C5H6N3O2 +·ClO4 −, is comprised of discrete perchlorate anions and 2-amino-3-nitro­pyridinium cations. The anion has a typical tetra­hedral geometry while the cation presents a nearly planar [maximum deviation = 0.007 (8) Å] pyridinium ring. Undulating [C5H6N3O2 +]n chains extending along the c-axis direction are linked via N—H⋯O hydrogen bonds. The cations are further connected to the anions by N—H⋯O hydrogen bonds and weak C—H⋯O inter­actions, leading to the formation of a three-dimensional network

Bis(2-amino-3-nitro­pyridinium) dihydrogen­diphosphate

The structure of the title compound, 2C5H6N3O2 +·H2P2O7 2−, contains infinite (H2P2O7 2−)n layers stacked perpendicular to the a axis. The 2-amino-3-nitro­pyridinium cations are arranged in pairs and are anchored between these layers, linking them by N—H⋯O and C—H⋯O hydrogen-bonding and electrostatic inter­actions between anionic and cationic species to form a three-dimensional network

Bis(2-amino-3-nitro­pyridinium) dichromate(VI)

The title compound, (C5H6N3O2)2[Cr2O7], consists of 2-amino-3-nitro­pyridinium cations and discrete dichromate anions linked together by N—H⋯O and C—H⋯O hydrogen bonds, forming thick layers parallel to (101). Layer cohesion is ensured by N—H⋯O hydrogen bonding in addition to electrostatic and van der Waals inter­actions, forming a three-dimensional framework. The dichromate anion is located on a twofold axis that passes through its bridging O atom

2-Amino-3-nitro­pyridinium hydrogen selenate

The asymmetric unit of the title compound, C5H6N3O2 +·HSeO4 −, contains two monoprotonated 2-amino-3-nitro­pyridinium cations and two hydrogen selenate anions which are connected through N—H⋯O and O—H⋯O hydrogen bonds, building chains parallel to the a direction. These chains are further connected to each other by weaker C—H⋯O hydrogen-bonding inter­actions, leading to the formation of a three-dimensional network

Hydrothermal Synthesis, Characterization and Photoluminescent Properties of a New Vanadium Substituted Keggin Assembly Supported by Ni Complex

A new monosubstituted vanadium Keggin-type tungstophosphate derivative, [Ni(phen)3]2[PVW11O40].4H2O  (phen = 1,10’-phenanthroline), has been hydrothermally synthesized and characterized by powder and single-crystal XRD methods, scanning electron microscopy (SEM), IR, UV-Vis and photoluminescence spectroscopy measurements. X-ray diffraction analysis reveals that the compound crystallizes in the monoclinic system with space group C2/c with a = 19.659 (2) Å, b = 18.054 (3) Å, c = 25.227 (4) Å and β = 100.63 (2)° and its crystal packing displays alternating [PV1W11O40(H2O)4]n4- ribbons extending along [110] and [10] respectively at z = 0 and z = ½. These ribbons are extended into a 3D supramolecular framework by hydrogen-bonding interactions generating vacant 1D-channels along c-axis leading to anchorage of transition metal complexes. Moreover, the electronic properties and the optical band gaps have also been investigated well confirming the semiconductor behavior and photoluminescent property of reported material

2-Amino-3-nitro­pyridinium perrhenate

In the title mol­ecular salt, (C5H6N3O2)[ReO4], the cations and tetrahedral anions are linked by trifurcated N—H⋯(O,O,O) and bifurcated N—H⋯(O,O) hydrogen bonds, as well as weak C—H⋯O inter­actions. This results in alternating corrugated inorganic and organic layers in the crystal

2-Amino­pyrimidinium hydrogen sulfate

In the crystal structure of the title compound, C4H6N3 +·HSO4 −, hydrogen sulfate anions self-assemble through O—H⋯O hydrogen bonds, forming chains along the b axis, while the cations form centrosymmetric pairs via N—H⋯N hydrogen bonds. The 2-amino­pyrimidinium pairs are linked to the sulfate anions via N—H⋯O hydrogen bonds, forming a two-dimensional network parallel to (10). In addition, weak inter­molecular C—H⋯O contacts generate a three-dimensional network