The planar [maximum deviation 0.0066 (4) Å] symmetrical molecule of the title compound, C10H6S2, lies across a crystallographic inversion centre.The thiophene rings 7BP@Pk are rotationally disordered about the acetylene bond, with the two pseudo inversion-related S atoms in 0.80:0.
20 Loofah occupancy sites.The C[triple-bond]C bond distance is 1.195 (9) Å.