Acta Cryst. (2008). E64, o571-o572  [ doi:10.1107/S1600536808003784 ]

1,4-Dihydroxyquinoxaline-2,3(1H,4H)-dione

R. Abu-El-Halawah, B. F. Ali, M. M. Ibrahim, J. A. Zahra and W. Frey

Abstract: The asymmetric unit of the title compound, C₈H₆N₂O₄, contains one half-molecule; a twofold rotation axis bisects the molecule. The quinoxaline ring is planar, which can be attributed to electron delocalization. In the crystal structure, intermolecular O-HO hydrogen bonds link the molecules into R₂²(10) motifs, leading to layers, which interact via phenyl-phenyl interactions (CC distances in the range 3.238-3.521 Å).

Online 8 February 2008

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