Abstract
The cover picture shows the zwitterionic iminium phosphate [P(C2F5)2F3{C(NEt2)(CHF-CF3)] obtained by the reaction of Ishikawa's reagent Et2N-CF2-CHF-CF3 with the Lewis-acidic P(C2F5)2F. The fluorinating Ishikawa's reagent most likely transfers a fluoride ion onto the phosphorus center, transiently forming [Et2N=CF-CHF-CF3][P(C2F5)2F2]. The α-fluorine atom of the iminium cation [Et2N=CF-CHF-CF3]+ is labile towards substitution. Subsequently, insertion of the phosphate(III) anion into the activated C−F bond delivers the zwitterionic product (https://doi.org/10.1002/zaac.202000198).
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