Date Published: August 01, 2012
Publisher: International Union of Crystallography
Author(s): Irvin N. Booysen, Muhammed B. Ismail, Matthew P. Akerman.
In the title co-crystal, C12H12N6O4·C14H16N4O2S, both molecules are essentially planar [maximum deviations = 0.129 (1) and 0.097 (1) Å, respectively]. The tricyclic and Schiff base molecules are alternately stacked along the a axis and are linked by π–π interactions with centroid–centroid distances of 3.5170 (16) and 3.6576 (17) Å. An intramolecular C—H⋯O hydrogen bond and a C—H⋯S contact occur in the Schiff base molecule. In the crystal, N—H⋯O, N—H⋯N and C—H⋯O hydrogen bonds lead to the formation of a three-dimensional network.
For the crystal structure of a Schiff base derived from 5,6-diamino-1,3-dimethylpyrimidine-2,4(1H,3H)-dione and picolinaldehyde, see: Booysen et al. (2011a ▶). For the crystal structure of the title Schiff base, see: Booysen et al. (2011b ▶). For the crystal structure of the title tricyclic compound, see: Booysen et al. (2008 ▶). For details of the use of the Schiff base N-(2-aminobenzylidene)-5-amino-1,3-dimethylpyrimidine-2,4(1H,3H)-dione as a chelating ligand towards rhenium, see: Mayer et al. (2010 ▶). For applications of Schiff base ligands, see: Kumar et al.. 2009 ▶.