Two routes to RFIF6 compounds were investigated:(a) the substitution of F by RF in IF7 and (b) the fluorine addition to iodine in RFIF4 precursors. For route (a) the reagents C6F5SiMe3, C6F5SiF3,[NMe4][C6F5SiF4], C6F5BF2, and 1, 4-C6F4 (BF2) 2 were tested. C6F5IF4 and CF3CH2IF4 were used in route (b) and treated with the fluoro-oxidizers IF7,[O2][SbF6]/KF, and K2 [NiF6]/KF. The observed sidestep reactions in case of routes (a) ...