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The experimental charge density distribution of two new iodoperfluoroalkylimidazole derivatives has been determined with the aspherical atom model against single-crystal X-ray diffracted intensities and analyzed by means of the Bader Quantum Theory of Atoms In Molecules. The compounds self-assemble in the solid state forming infinite chains through strong I···N halogen bonds. The topological and energetic features of these interactions have been determined and compared with those of a previously reported I···N interaction formed by an iodoperfluoroarene derivative, allowing elucidation of the role of hybridization of the carbon atom bonded to the halogen atom in the nature of the halogen bonding interaction. The weaker interactions present in the crystal structures have been investigated as well, with particular attention to F···F interactions. They have also been analyzed through the Interacting Quantum Atoms approach in order to elucidate their role in stabilizing the crystal structure.

Featuring I···N Halogen Bond and Weaker Interactions in Iodoperfluoroalkylimidazoles: An Experimental and Theoretical Charge Density Study