1,2,4,5-Tetrafluoro-3,6-diiodobenzene-4-(pyridin-4-ylsulfanyl)pyridine (1/1)

Abstract

The asymmetric unit of the title 1:1 adduct, C10H 8N2S·C6F4I2, comprises a half-molecule of 1,2,4,5-tetra-fluoro-3,6-diiodo-benzene, and half a 4-(pyridin-4-ylsulfan-yl)pyridine molecule. The former is completed by crystallographic inversion symmetry, the latter by twofold symmetry, with the S atom lying on the rotation axis. The almost planar 1,2,4,5-tetra-fluoro-3,6- diiodo-benzene molecule (r.m.s. deviation of all 12 atoms = 0.016 Å) and twisted 4-(pyridin-4-ylsulfan-yl)pyridine molecule [dihedral angle between pyridyl rings = 54.88 (13)°] are connected by N⋯I interactions [2.838 (4) Å], generating a supra-molecular chain with a step-ladder topology. These chains are connected in the crystal by C - H⋯F and C - H⋯π(pyridyl) interactions.