Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2014 Mar 26;70(Pt 4):o473-4.
doi: 10.1107/S160053681400525X. eCollection 2014 Apr 1.

2-Amino-5-nitro-pyridinium hydrogen oxalate

M Ambrose Rajkumar  1 , S Stanly John Xavier  2 , S Anbarasu  1 , Prem Anand Devarajan  1 , M NizamMohideen  3
Affiliations

2-Amino-5-nitro-pyridinium hydrogen oxalate

M Ambrose Rajkumar et al. Acta Crystallogr Sect E Struct Rep Online. .

Abstract

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.

PubMed Disclaimer

Figures

Fig. 1.
Fig. 1.
View of the title compound showing the atom-numbering scheme. Displacement ellipsoids are drawn at the 40% probability level. H atoms are presented as a small spheres of arbitrary radius.
Fig. 2.
Fig. 2.
The crystal packing of the title compound viewed along a axis. N—H···O, O—H···O hydrogen bonds and weak C—H···O intermolecular inteeractions are shown as dashed lines, forming a three-dimensional network. H atoms not involved in hydrogen bonding have been omitted for clarity.
See this image and copyright information in PMC

References

    1. Anderson, F. P., Gallagher, J. F., Kenny, P. T. M. & Lough, A. J. (2005). Acta Cryst. E61, o1350–o1353.
    1. Babu, K. S. S., Peramaiyan, G., NizamMohideen, M. & Mohan, R. (2014). Acta Cryst. E70, o391–o392. - PMC - PubMed
    1. Bernstein, J., Davis, R. E., Shimoni, L. & Chang, N.-L. (1995). Angew. Chem. Int. Ed. Engl. 34, 1555–1573.
    1. Bruker (2004). APEX2, SAINT and XPREP Bruker AXS Inc., Madison, Wisconsin, USA.
    1. Derissen, J. L. & Smith, P. H. (1974). Acta Cryst. B30, 2240–2242.