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Acta Cryst. (2012). E68, o3460-o3461
[ doi:10.1107/S1600536812047526 ]

1,4-Dihydrobenzo[g]quinoxaline-2,3-dione

F. Eya'ane Meva, D. Schaarschmidt, M. A. Abdulmalic and T. Rüffer

Abstract: The title compound, C12H8N2O2, was prepared by the reaction of the diethyl ester of naphthalenebis(oxamate) with tert-BuNH2. The molecule is nearly planar, with an r.m.s. deviation of 0.017 Å from the plane through all 16 non-H atoms. In the crystal, a three-dimensional network is formed, composed of layers of molecules along the b- and c-axis directions, due to the formation of intermolecular N-H...O hydrogen bonds, as well as of chains along the a-axis direction due to parallel displaced sandwich-type [pi]-[pi] interactions with average distances between the interacting molecules in the range 3.35-3.40 Å.


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