The application scope of the [(bpy)CuSeCF3]2 complex was then extended to aromatic halides for the formation of C(sp2)–SeCF3 bonds. The authors demonstrated that a very broad range of (hetero)aryl halides and vinyl halides could be trifluoromethylselenolated that way (Scheme 2) [13,15-17]. Mechanistically, the authors postulated the involvement of copper(I)/(III) oxidation states.