5-(4,5-Diiodo-1,3-dithiol-2-yl-idene)-4',5'-bis(methyl-sulfan-yl)-2,2'-bi-1,3-dithiol-4(5H)-one.

The mol-ecular framework of the title compound, C(11)H(6)I(2)OS(8), is almost planar [maximum deviation = 0.057†(5)†à ] except for the two methyl-sulfanyl groups, which are twisted relative to the mol-ecular skeleton, with C-C-S-C torsion angles of 49.74†(22) and 82.91†(21)°. In the crystal, mol-ecules are stacked alternately in opposite orientations, forming a one-dimensional column along the b axis. The inter-action between adjacent columns is accomplished through S⋯S [3.4289†(5)†à ], S⋯I [3.4498†(4)†à ] and O⋯I [2.812†(2)†à ] contacts.