Crystal structure and Hirshfeld surface analysis of 5-oxo-7-phenyl-2-(phenyl­amino)-1H-[1,2,4]triazolo[1,5-a]pyridine-6,8-dicarbo­nitrile dimethyl sulfoxide monosolvate

In the title compound, C(20)H(12)N(6)O·C(2)H(6)OS, the [1,2,4]triazolo[1,5-a]pyridine ring system is almost planar and makes dihedral angles of 16.33 (7) and 46.80 (7)°, respectively, with the phenyl­amino and phenyl rings. In the crystal, mol­ecules are linked by inter­molecular N—H⋯O and C—H⋯O hydrogen bonds into chains along the b-axis direction through the dimethyl sulfoxide solvent mol­ecule, forming C(10)R (2) (1)(6) motifs. These chains are connected via S—O⋯π inter­actions, π–π stacking inter­actions between the pyridine rings [centroid-to-centroid distance = 3.6662 (9) Å] and van der Waals inter­actions. A Hirshfeld surface analysis of the crystal structure indicates that the most important contributions to the crystal packing are from H⋯H (28.1%), C⋯H/H⋯C (27.2%), N⋯H/H⋯N (19.4%) and O⋯H/H⋯O (9.8%) inter­actions.