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

Abstract

The title compound, C20H18N2S, 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)°.