title: 2,2'-Diiodo-azobenzene.
abstract: The mol-ecular structure of the title compound, C(12)H(8)I(2)N(2) [systematic name: (E)-bis-(2-iodo-phen-yl)diazene], exhibits an essentially planar trans geometry [maximum deviation = 0.022 (4) Å] with the iodine atoms ortho to the azo bridge. In the crystal, offset π-stacking leads to the formation of columns along the a axis [closest C⋯C distance = 3.383 (4) Å].
authors.affiliation: Department of Chemistry and Chemical Biology, McMaster University, 1280 Main, Street West, Hamilton, Ontario,  Canada  L8S 4M1.
authors.forename: Philip J W
authors.initials: PJ
authors.lastname: Elder
authors.forename: Ignacio
authors.initials: I
authors.lastname: Vargas-Baca