2-Amino-3-nitropyridinium perrhenate

2-Amino-3-nitro­pyridinium perrhenate

In the title mol-ecular salt, (C(5)H(6)N(3)O(2))[ReO(4)], 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 inter-actions. This results in alternating corrugated inorganic and organic layers in the crystal.

Studies on the Synthesis, Growth, Characterization of 2-amino- 5-nitropyridinium-toluenesulfonate Single Crystals

2-Amino-3-methyl­pyridinium 2-amino-5-methyl­pyridinium sulfate monohydrate

The asymmetric unit of the title compound, 2C(6)H(9)N(2) (+)·SO(4) (2-)·H(2)O, contains two isomeric protonated amino-methyl-pyridine cations, a sulfate anion and a solvent water mol-ecule. The cations are in the iminium tautomeric form. In the crystal structure, inter-molecular O-H⋯O, N-H⋯O and weak C-H⋯O hydrogen bonds link the components into a three-dimensional network. Additional stabiliza...

2-Amino-3-[(E)-(2-hy­droxy-3-methyl­benzyl­idene)amino]­but-2-ene­dinitrile

The title compound, C(12)H(10)N(4)O, is a Schiff base obtained from the condensation of diamino-maleonitrile and 2-hy-droxy-3-methyl-benzaldehyde. The mol-ecule is roughly planar, with an r.m.s. deviation of 0.0354 Å, and adopts the phenol-imine tautomeric form. An intra-molecular O-H⋯N hydrogen bond involving the O-H group and the azomethine N atom generates an S(6) ring. In the crystal, there...

2-Amino-3-nitro­benzoic acid

The title compound, C(7)H(6)N(2)O(4), is approximately planar (r.m.s. deviation = 0.026 Å for the 13 non-H atoms). The mol-ecular structure is stabilized by intra-molecular N-H⋯O hydrogen bonds, which generate S(6) ring motifs. In the crystal, mol-ecules are linked via inter-molecular N-H⋯O, O-H⋯O and C-H⋯O hydrogen bonds into a three-dimensional network.