Variable-temperature NMR spectroscopy confirmed the formation of carbocations in this system. For example, mixtures of cumyl chloride and [Zn (C6F5) 2]· toluene in CD2Cl2 at À788C show the signals of the PhCMe2+ cation as well as those of phenyltrimethylindane, the product of cationic cyclization (Scheme 1).[16, 17] The formation of nonnucleophilic zincate anions in this system was demonstrated by the reaction of Ph3CCl with [Zn (C6F5) ...