[(C6F5)(2)IF2][BF4], the first salt with the electrophilic cation [(C6F5)(2)IF2](+): Synthesis, reactivity, and structure

The substitution of hypervalently bonded fluorine atoms in C6F5IF4 was performed with C6F5BF, and resulted in the new salt [(C6F5)(2)IF2][BF4]. The iodonium(V) salt was characterized by multi-NMR and Raman spectroscopy and X-ray crystal structure analysis. The fluorinating ability of the new electrophilic cation [(C6F5)(2)IF2](+) was exemplified in reactions with monovalent iodine compounds (C6F5I, p-FC6H4I, and I-2) and with electron-poor tri(organyl)pnictanes ER3 (E = P, As, Sb, Bi; R = C6F5). In a heterogeneous reaction with CsF in MeCN the [(C6F5)(2)IF2](+) cation forms the dinuclear [{(C6F5)(2)IF2}(2)F](+) cation.