(E)-Diethyl 2-amino-5-(2-thienylmethyleneamino)thiophene-3,4-dicarboxylate

Abstract

The highly conjugated title compound, C15H16N2O4S2, exhibits an extended planar configuration. This unusual behavior is the result of the azomethine that adopts the E configuration concomitant with the anti­parallel orientation of the thio­phene units. The nitro­gen-containing double bond is also ca 0.04 Å shorter than its carbon analogue.