2-Amino-5-nitro-pyridinium hydrogen oxalate.
In the cation of the title mol-ecular salt, C5H6N3O2 (+)·C2HO4 (-), the dihedral angle between the aromatic ring and the nitro group is 3.5 (3)°; in the anion, the dihedral angle between the CO2 and CO2H planes is 10.5 (2)°. In the crystal, the anions are linked into [100] chains by O-H⋯O hydrogen bonds. The cations cross-link the chains by way of N-H⋯O hydrogen bonds and the structure is consolidated by C-H⋯O inter-actions.
Physics Research Centre, Department of Physics, St Xavier's College (Autonomous), Palayamkottai 627 002, Tamil Nadu, India.
M Ambrose
MA
Rajkumar
Department of Chemistry, St Xavier's College (Autonomous), Palayamkottai 627 002, Tamil Nadu, India.
S Stanly John
SS
Xavier
Physics Research Centre, Department of Physics, St Xavier's College (Autonomous), Palayamkottai 627 002, Tamil Nadu, India.
S
S
Anbarasu
Physics Research Centre, Department of Physics, St Xavier's College (Autonomous), Palayamkottai 627 002, Tamil Nadu, India.
Prem Anand
PA
Devarajan
Department of Physics, The New College (Autonomous), Chennai 600 014, Tamil Nadu, India.
M
M
NizamMohideen