The title complex, [RhBr(C8H12)(C24H19F5N2)], has a distorted pseudo-square- planar geometry. The Rh-C bond distance between the N-heterocyclic ligand and the metal atom is 2.022 (3) angstrom. The angle between the carbene heterocycle and the coordination plane is 75.60 (11)degrees. It is shown that the average Rh-C(cyclooctadiene) distance is linearly dependent on the Rh-C(imidazole) distance in this type of compound. The crystal structure contains one intramolecular and two intermolecular types of C-H center dot center dot center dot F interactions, as well as one type of pi-pi stacking interaction.