title: 3-Nitro-5-(4-pyridinio)benzoate.
abstract: The title compound, C(12)H(8)N(2)O(4), crystallizes as a zwitterion in which the pyridyl N atom is protonated. The dihedral angle between the benzene and pyridinium rings is 27.9 (2)°. In the crystal, N-H⋯O hydrogen bonds link adjacent zwitterions into a three-dimensional structure.
authors: College of Chemistry and Chemical Engineering, Pingdingshan University, Pingdingshan 467000, People's Republic of China.
authors: Xiao-Jun
authors: XJ
authors: Zhao
authors: Cheng-Jun
authors: CJ
authors: Hao
references: Acc Chem Res. 2001 Mar;34(3):239-47
references: 11263882
references: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references: 18156677