Acta Cryst. (2004). E60, o92-o94  [ doi:10.1107/S1600536803028368 ]

3-Methyl-1H-quinoxalin-2-one

I. V. Nikolaenko and O. Q. Munro

Abstract: In the crystal structure of the title compound, C₉H₇N₂O, one-dimensional chains of planarmolecules are interlocked at a dihedral angle of about 30° and display weak aromatic interactions, consistent with - stacking. The distance between quinoxaline rings in two neighbouring planes is 3.972  (6)  Å. Within a chain, molecular dimers, which are held together by a pair of strong intermolecular N-HO hydrogen-bonding interactions at a distance of 2.792  (4)  Å, are linked by weak ditopic hydrogen-bonding interactions C-HN at a distance of 3.560  (6)  Å.

Online 19 December 2003

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