1,3,5-Tri­fluoro-2,4,6-tri­iodo­benzene–piperazine (2/1)

The single-crystal structure of the title compound, C(4)H(10)N(2)·2C(6)F(3)I(3), features a moderately strong halogen bond between one of the three crystallographically distinct iodine atoms and the nitro­gen atom. The iodine–nitro­gen distance is 2.820 (3) Å, corresponding to 80% of the sum of their van der Waals radii. The C—I⋯N halogen bond angle is 178.0 (1)°, consistent with the linear inter­action of nitro­gen via a σ-hole opposite the carbon–iodine covalent bond. The other two iodine atoms do not engage in halogen bonding. Some weak C—H⋯F and —H⋯I interactions are also observed. The complete piperazine molecule is generated by symmetry. [Image: see text]