ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS, vol.62, 2006 (SCI-Expanded)
The title compound, C14H12N2O4 center dot H2O, is stabilized in the solid state as a keto - amine tautomer, with two strong intramolecular N - H center dot center dot center dot O, two intermolecular O - H center dot center dot center dot O and three intermolecular C - H center dot center dot center dot O hydrogen bonds. The organic molecule is approximately planar, with a dihedral angle of 1.90 ( 8) degrees between the two carbocyclic rings. The water molecules lie on a twofold symmetry axis.