Synthesis and Lewis acidity of fluorophosphonium cations

Christopher B. Caputo, Daniel Winkelhaus, Roman Dobrovetsky, Lindsay J. Hounjet, Douglas W. Stephan

Research output: Contribution to journalArticlepeer-review

Abstract

A series of fluorophosphonium salts, [R3PF][X] (R = alkyl or aryl; X = FB(C6F5)3, [B(C6F5)4]), have been prepared by reactions of phosphine/borane frustrated Lewis pairs (FLPs) with XeF2 or difluorophosphoranes with [Et3Si][B(C6F5)4]. As the substituents bound to phosphorus become increasingly electron withdrawing, the corresponding fluorophosphonium salts are shown to be increasingly Lewis acidic. Calculations were also performed to determine the relative fluoride ion affinities (FIA) of these fluorophosphonium cations.

Original languageEnglish
Pages (from-to)12256-12264
Number of pages9
JournalDalton Transactions
Volume44
Issue number27
DOIs
StatePublished - 21 Jul 2015
Externally publishedYes

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