Acta Cryst. (2005). E61, o1728-o1730  [ doi:10.1107/S1600536805014753 ]

1,10-Phenanthrolin-1-ium 2-carboxy-6-nitrobenzoate

M.-L. Guo

Abstract: In the title salt, C₁₂H₉N₂⁺·C₈H₄NO₆^-, one N atom of 1,10-phenanthroline is protonated [N-H = 1.00 (2) Å], while the other N atom is not. Protonation of the N atom causes the C-N-C angle to increase [122.3 (2)° in the protonated ring versus 116.2 (2)° in the unprotonated ring]. In the crystal structure, N-HO and O-HO hydrogen bonds and van der Waals forces stabilize the packing of the ions.

Online 14 May 2005

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