Acta Cryst. (2011). E67, o1926 [ doi:10.1107/S1600536811025025 ]
Abstract: In the title compound, C11H9N5O, the pyrazolopyrimidin-4-one ring system is almost planar, with a maximum deviation of 0.0546 (13) Å for the O atom. The crystal packing is stabilized by intermolecular N-HN, C-HO and C-HN hydrogen bonds. In addition, - stacking is found between the pyridine ring and the pyrazolopyrimidin-4-one ring systems, with centroid-centroid distances in the range 3.9627 (12)-4.6781 (12) Å.
Online 6 July 2011
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