Crystal structure ofN,N′-[(thiophene-2,5-diyl)bis(methanylylidene)]di-p-toluidine
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The title compound, C20H18N2S, was synthesized by the condensation reaction betweenp-toluidine and thiophene-2,5-dicarboxaldehye in refluxing toluene withp-toluenesulfonic acid added as catalyst. The molecule lies on a twofold rotation axis and adopts anEorientation 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)°.
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