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The title compound, C 20 H 18 N 2 S, was synthesized by the condensation reaction between  p -tolu­idine and thio­phene-2,5-dicarboxaldehye in refluxing toluene with  p -toluene­sulfonic acid added as catalyst. The mol­ecule lies on a twofold rotation axis and adopts an  E  orientation with respect to the azomethine bonds. The dihedral angle between the unqiue benzene ring and the least-squares plane [maximum deviation = 0.0145 (14) Å] containing the azomethine and thio­phene groups is 32.31 (6)°.

Crystal structure ofN,N′-[(thiophene-2,5-diyl)bis(methanylylidene)]di-p-toluidine