Acta Cryst. (2013). E69, o1133-o1134 [ doi:10.1107/S1600536813016796 ]
Abstract: In the title adduct, C15H10N4·2C10H10N2, the pyrimidine ring is nearly co-planar with the heteroatomic perimidine ring, as indicated dihedral angle between their mean planes of 3.21 (11)°. The diaminonaphthalene molecules are slightly twisted [dihedral angles = 4.2 (2) and 3.0 (2)°] because of the steric encumbrance of NH2 groups. The perimidine and diaminonaphthalene molecules are linked by N-HN hydrogen bonds, forming an R44(12) graph-set motif across an inversion center. In the crystal, alternating layers of the perimidine and diaminonaphthalene molecules are formed along . In the perimidine layer, molecules are - stacked along the c-axis direction with an interplane separation of approximately 3.4 Å.
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