Acta Cryst. (2013). E69, o491-o492 [ doi:10.1107/S1600536813005837 ]
Abstract: The asymmetric unit of the title compound, C26H18N6O4S, contains two independent molecules (A and B). The dihedral angles between the oxadiazole ring and naphthalene ring system are 42.59 (14) and 6.88 (14) Å in molecules A and B, respectively. The dihedral angles between the pyridine and benzene rings in A and B are 65.53 (13 )and 87.67 (13) Å, respectively. In the crystal, molecules A and B are linked through a pair of N-HN hydrogen bonds involving one -NH2 group H atom and second pair of N-HN hydrogen bonds involving the other -NH2 group H atom, forming an -ABAB- ribbon along  containing R22(8) and R22(12) ring motifs. These ribbons are further connected by weak C-HN, C-HO and C-H interactions, resulting in a three-dimensional network. The crystal studied was a non-merohedral twin with refined components 0.906 (1):0.094 (1).
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