Acta Cryst. (2008). E64, o1662  [ doi:10.1107/S1600536808024021 ]

6-[(Dimethylamino)methyleneamino]-1,3-dimethylpyrimidine-2,4(1H,3H)-dione dihydrate

S. Das, B. K. Saikia, B. Sridhar and A. J. Thakur

Abstract: Uracil, the pyrimidine nucleobase, which combined with adenine forms one of the major motifs present in the biopolymer RNA, is also involved in the self-assembly of RNA. In the title compound, C₉H₁₄N₄O₂·2H₂O, the asymmetric unit contains one dimethylaminouracil group and two water molecules. The plane of the N=C-NMe₂ side chain is inclined at 27.6 (5)° to the plane of the uracil ring. Both water molecules form O-HO hydrogen bonds with the carbonyl O atoms of the uracil group. Additional water-water hydrogen-bond interactions are also observed in the crystal structure. The O-HO hydrogen bonds lead to the formation of a two-dimensional hydrogen-bonded network cage consisting of two dimethylaminouracil groups and six water molecules.

Online 6 August 2008

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