3-Carb-oxy-5-(pyridinium-4-yl)benzoate: a redetermination.

ABSTRACT: The title compound, C(13)H(9)NO(4), crystallizes in a zwitterionic form with the pyridine N atom protonated and the carboxyl OH group deprotonated. The benzene and pyridinium rings are inclined with a dihedral angle of 31.42?(14)° between them. A previous report of this stucture claims, we believe incorrectly, that neither of the carboxyl-ate groups is deprotonated [Zhang et al. (2010 ?). Acta Cryst. E66, o2928-o2928]. In the crystal, inter-molecular O-H?O, N-H?O and weak C-H?O hydrogen-bonding inter-actions link adjacent mol-ecules into a three-dimensional supra-molecular network.

SUBMITTER: Li SJ 

PROVIDER: S-EPMC3120316 | biostudies-literature | 2011 Jun

REPOSITORIES: biostudies-literature