In the title compound, C(16)H(21)N(2)O(+)·Cl(-), the amide group makes a dihedral angle of 25.9 (1)° with respect to the pyridine ring. In the crystal, inter-molecular N-H⋯Cl bonds and weak C-H⋯Cl and C-H⋯O contacts link the cations and the anions into layers parallel to the ac plane. The layers are packed along [010] by hydro-phobic inter-actions between adamantane units.

The title organic salt, C(8)H(8)N(3) (+)·Cl(-)·H(2)O, exhibits a rich hydrogen-bonding network involving all constituent species. The water mol-ecules are engaged in strong O-H⋯Cl inter-actions with the chloride anions, two neighboring protonated 2-(1H-pyrazol-3-yl)pyridinium species inter-act via N-H⋯N bonds with two pyrazole rings. Further, a short and highly directional C-H⋯O inter-action is...

In the title hydrated salt, C13H10Cl2N3O(+)·Cl(-)·3H2O, the organic cation exhibits a dihedral angle of 8.26 (14)° between the mean planes of the pyridinium and benzene rings, and dihedral angles of 8.70 (15) and 15.93 (5)° between the mean planes of the hydrazide group and the benzene and pyridinium rings, respectively. In the crystal, N-H⋯O, N-H⋯Cl, C-H⋯O, C-H⋯Cl, O-H⋯O, O-H⋯N and O-H⋯Cl hydr...

Four halogen and hydrogen bonding rotaxane host systems featuring pyridinium bis-amide-iodotriazole/prototriazole and pyridinium bis-amide-iodotriazolium/prototriazolium axle components have been synthesized by CuAAC-mediated mono-stoppering chloride anion templation and post-rotaxanation methylation reactions. In competitive 45 : 45 : 10 CDCl3-CD3OD-D2O aqueous solvent media, the dicationic ha...

A rapid and accurate method for analyzing pyridinium oximes-N-methylpyridinium2-aldoxime chloride, N,N’-trimethylene-(pyridinium-4-aldoxime) dihalide, and N,N’oxydimethyl(pyridinium-4-aldoxime) dich bride-in plasma, urine, and whole blood is described.The method is completely automated and requires small sample volumes. Concentrations ranging from 3 to 120 Eq./L. in biologic fluids can be deter...

In the title salt, C(16)H(21)N(2)O(+)·Cl(-), the amide group makes a dihedral angle of 24.98 (2)° with respect to the pyridinium ring. In the crystal, both the amide and pyridinium N atoms are involved in N-H⋯Cl hydrogen bonding. Weak inter-molecular C-H⋯Cl and C-H⋯O inter-actions also occur.

In the title compound, C(6)H(6)N(5) (+)·Cl(-), the pyridinium and tetra-zole rings are essentially coplanar. The pyridine N atoms are protonated. In the crystal structure, mol-ecules are connected via N-H⋯Cl, C-H⋯Cl, C-H⋯N and N-H⋯N hydrogen bonds into layers that are parallel to the (001) plane. There are two crystallographically independent mol-ecules in the asymmetric unit which are located ...