A first methodical approach to salts with unsymmetrical fluorophenyl(pentafluorophenyl)difluoroiodonium(V) cations [R_f(R _F)IF_2]~+ (R_f=x-FC_6H _4, x=2, 3, 4; R_F=C_6F_5)

摘要

A promising approach to the unknown type of [Ar′(Ar)IF_2]X salts is offered. x-FC_6H_4IF_4 (x=2, 3, 4) reacts with C_6F_5BF_2 in CH_2Cl_2 and forms [x-FC_6H_4(C_6F_5)IF _2][BF_4] salts in good yields. For [4-FC_6H _4(C_6F_5)IF_2][BF_4] the fluoro-oxidizer property is shown in reactions with weakly reducing agents like E(C_6F_5)_3 (E=P, As, Sb, Bi) and ArI (Ar=4-FC_6H_4, C_6F_5). The fluorine/aryl substitution method is also applied to the synthesis of [(4-FC_6H_4)_2IF_2][BF_4], an example with two identical aryl groups in the difluoroiodonium(V) moiety.