6-Nitro-2,3-bis-(thio-phen-2-yl)quinoxaline.

The title compound, CHNOS, was synthesized a condensation reaction in refluxing acetic acid. One thienyl ring is nearly coplanar with the quinoxaline unit [dihedral angle = 3.29 (9)°], the other makes an angle of 83.

5-Nitro-2,3-bis-(thio-phen-2-yl)quinoxaline.

The title compound, CHNOS, was synthesized a condensation reaction in refluxing acetic acid. The dihedral angles between the mean plane of the quinoxaline unit and the thienyl rings are 35.16 (5)° and 24.