“…The stabilization of the carbanion by two phenylsulfonyl groups is supported by the following observations: a) the parent carbanion I (Figure 1), studied by Henderson and others,9 has been readily prepared and proved to be highly thermostable, b) Dubenko et al 10. have reported the preparation of potassium salts of IV and V , c) later, Ochiai and co‐workers11 reported that brominated bis(perfluoroalkylsulfonyl) carbanion VI also can be crystallized as a fairly stable solid. Based on these studies, we decided to prepare the fluorine‐bearing carbanion II and study its stability under suitable conditions.…”