Soluble Fluoridobromates as Well‐Behaved Strong Fluorination Reagents

Abstract

We present a facile synthesis of the soluble fluoridobromates [NEt 3 Me][BrF 4 ] and [NEt 3 Me][Br 2 F 7 ] via fluorination of the corresponding bromide salts in acetonitrile, propionitrile or bromine. We structurally characterized the [BrF 2 ] – anion, an intermediate during the synthesis, for the first time. Additionally, the dissolution of noble metals to form the corresponding halometallates as well as the application of [NEt 3 Me][BrF 4 ] as a fluorination agent for disulfides to form pentafluorosulfanyls was studied.