Acta Cryst. (2008). E64, o1082-o1083  [ doi:10.1107/S1600536808014244 ]

N,N',N''-Triphenylguanidinium 5-nitro-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-1-ide

P. S. Pereira Silva, S. R. Domingos, M. Ramos Silva, J. A. Paixão and A. Matos Beja

Abstract: In the title compound, C₁₉H₁₈N₃^+.C₄H₂N₃O₄^-, the dihedral angles between the phenyl rings and the plane defined by the central guanidinium fragment are in the range 41.3 (1)-66.6 (1)°. The pyrimidine ring of the anion is distorted towards a boat conformation and the nitro group is rotated 11.4 (2)° out of the uracil plane. Hydrogen bonds assemble the ions in infinite helical chains along the b axis.

Online 17 May 2008

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