In the non-centrosymetric title compound, C(5)H(6)N(3)O(2) (+)·C(2)HO(4) (-), the hydrogen oxalate anions form corrugated chains parallel to the c axis, linked by O-H⋯O hydrogen bonds. The 2-amino-3-nitro-pyridinium cations are anchored between theses chains by N-H⋯O and C-H⋯O hydrogen bonds and van der Waals and electrostatic inter-actions, creating a three-dimensional network.

In the title compound, [CoCl(2)(C(6)H(8)N(2))(2)], the Co(II) ion is four-coordinated by two pyridine N atoms from the 2-amino-3-methyl-pyridine ligands and two chloride ions in a distorted tetra-hedral geometry. A weak intra-molecular N-H⋯Cl inter-action occurs. The crystal packing is stabilized by inter-molecular N-H⋯Cl and C-H⋯Cl hydrogen-bond inter-actions.

The main aim of the project is to synthesize an isomerically pure sample of 3-amino-2alkenoate, a useful β-amino acid derivative that is a precursor to molecules with medicinal properties. We successfully made the product from the reaction of ethyl acetoacetate and ammonium acetate dissolved in methanol. We also attempted to synthesize 3-pyrrole-2alkenoate from the reaction of our product and 2...

The 3-chloro-benzoate anion of the title salt, C(6)H(9)N(2) (+)·C(7)H(4)ClO(2) (-), is nearly planar with a dihedral angle of 2.44 (13)° between the benzene ring and the carboxyl-ate group. In the crystal, the protonated N atom and the 2-amino group of the cation are hydrogen bonded to the carboxyl-ate O atoms of the anion via a pair of N-H⋯O hydrogen bonds with an R(2) (2)(8) ring motif, formi...

The title compound, (C(5)H(6)N(3)O(2))(2)[Cr(2)O(7)], consists of 2-amino-3-nitro-pyridinium 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 inter-actions, forming a three-dimensional framework. The dichromate anion ...

The asymmetric unit of the title compound, C(6)H(7)N(2)O(2) (+)·Cl(-)·0.5H(2)O, consists of two protonated 2-amino-3-carb-oxy-pyridine cations, two chloride anions and one mol-ecule of water. The crystal packing can be described as alternating layers of cations and anions parallel to (110), which are linked together by O(w)-H⋯Cl inter-actions. In the crystal, four types of classical hydrogen bo...

In the title salt, C6H9N2(+)·C7H4ClO2(-), the 3-chloro-benzoate anion shows a whole-mol-ecule disorder over two positions with a refined occupancy ratio of 0.505 (4):0.495 (4). In the crystal, the cations and anions are linked via N-H⋯O hydrogen bonds, forming a centrosymmetric 2 + 2 aggregate with R2(2)(8) and R4(2)(8) ring motifs. The crystal structure also features a π-π stacking inter-actio...

In the crystal structure of the title salt, C(5)H(6)N(3)O(2) (+)·C(6)H(5)O(4)S(-), N-H⋯O and O-H⋯O hydrogen bonds link the cations and anions. The dihedral angle between the rings of the cation and anion is 79.91 (6)°.