Acta Cryst. (2006). E62, o1257-o1259  [ doi:10.1107/S1600536806007033 ]

3-Methyl-5-nitrouracil

P. Wagner and M. Kubicki

Abstract: The molecules of the title compound, C₅H₅N₃O₄, are approximately planar. The nitro group makes a dihedral angle of 1.3 (4)° with the plane of the six-membered ring. This coplanar disposition is a reason for the changes in valence angles in the vicinity of the nitro group. Molecules are connected into dimers by means of N-HO hydrogen bonds, and these dimers make larger structures with the help of relatively short C-HO hydrogen bonds.

Online 8 March 2006

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