![[HTML version]](/e/graphics/htmlborder.gif)
![[PDF version]](/e/graphics/pdfborder.gif)
![[CIF]](/e/graphics/cifborder.gif)
![[3d view]](/e/graphics/3dviewborder.gif)
![[Structure Factors]](/e/graphics/structurefactorsborder.gif)
![[Supplementary Material]](/e/graphics/supplementarymaterialsborder.gif)
![[CIF check Report]](/e/graphics/checkcifborder.gif)
![[Open access]](/e/graphics/free.gif)
![[Contents scheme]](fb2119contents.gif)
Acta Cryst. (2009). E65, o335 [ doi:10.1107/S1600536809001093 ]
Abstract: The structure of the title compound, C9H7NO6, is essentially planar [maximum deviation 0.284 (2)Å] except for the methyl H atoms. The crystal structure is stabilized by asymmetric O-H
O hydrogen bonds linking the hydrogen carboxylates into pairs around the inversion centres. There is also
-
stacking of the benzene rings [centroid-centroid distance 3.6912 (12) Å].
Online 17 January 2009
Copyright © International Union of Crystallography
IUCr Webmaster