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Updated: Jun 22, 2025

Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI
Published on: November 22, 2016
Phosphonium SF5 - Salts Derived from Sulfur Hexafluoride as Deoxyfluorination Reagents
Maike B Röthel1, Andreas Schöler1, Florenz Buß2
1Institute of General, Inorganic and Theoretical Chemistry, Universität Innsbruck, 6020, Innsbruck, Austria.
Abstract:
Sulfur based deoxyfluorination reagents are usually derived from the corrosive gas SF4. Herein, we report the synthesis and properties of an easily accessible phosphonium salt [(tmg)3PF]+SF5 - (1) which was obtained from the reaction of sulfur hexafluoride (SF6) with tris(tetramethylguanidinyl)phosphine. The performance of this crystalline SF5 - salt as a reagent in deoxyfluorination reactions was investigated together with a second SF5 - salt [(R1)3PF]+SF5 - (2) containing bulky substituents (R1=1,3-di-tert-butylimidazolidin-2-ylidenamino). Both reagents proved to be effective for the deoxyfluorination of various functional groups including alcohols, anhydrides, and amides.
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