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Updated: Jun 5, 2026

Modification and Functionalization of the Guanidine Group by Tailor-made Precursors
Published on: April 27, 2017
N,N',N''-Triphenyl-guanidinium 5-nitro-2,4-dioxo-1,2,3,4-tetra-hydro-pyrimidin-1-ide
P S Pereira Silva1, S R Domingos, M Ramos Silva
1CEMDRX, Physics Department, University of Coimbra, P-3004-516 Coimbra, Portugal.
Abstract:
In the title compound, C(19)H(18)N(3) (+.)C(4)H(2)N(3)O(4) (-), 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.
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