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Acta Cryst. (2009). E65, o1042 [ doi:10.1107/S1600536809013063 ]
Abstract: The asymmetric unit of the title compound, C13H10N2O4, contains two crystallographically independent molecules. The aromatic rings are oriented at dihedral angles of 24.39 (3) and 7.47 (3)° in the two molecules and intramolecular N-H
O and O-H
O hydrogen bonds result in the formation of two planar six-membered rings. In the crystal structure, intermolecular O-H
O and C-H
O hydrogen bonds link the molecules into chains, forming R22(10) ring motifs. Weak
-
contacts between the benzene and phenyl rings [centroid-centroid distance = 3.955 (3) Å] may further stabilize the structure.
Online 18 April 2009
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