Acta Crystallographica, Section C: Crystal Structure Communications 1997-10-15

2-Aminonicotinic acid.

A J Dobson, R E Gerkin

Index: Acta Crystallogr. C 53 ( Pt 10) , 1427-9, (1997)

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Abstract

2-Aminonicotinic acid, C6H6N2O2, crystallized in the centrosymmetric space group P2(1)/c in the zwitterionic form. Intermolecular N--H...O hydrogen bonds with N...O distances of 2.652 (2) and 2.807 (2) A link molecules into two sets of zigzag chains propagating along the b axis. The two sets of chains are crosslinked by C--H...O interactions. The dihedral angle between the planes of adjacent molecules in a chain is 9.77 (7) degrees. An intramolecular N--H...O hydrogen bond is also present.

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