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Issue 27, 2015
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Synthesis and Lewis acidity of fluorophosphonium cations

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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.

Graphical abstract: Synthesis and Lewis acidity of fluorophosphonium cations

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Article information

16 Jan 2015
06 Mar 2015
First published
11 Mar 2015

Dalton Trans., 2015,44, 12256-12264
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Synthesis and Lewis acidity of fluorophosphonium cations

C. B. Caputo, D. Winkelhaus, R. Dobrovetsky, L. J. Hounjet and D. W. Stephan, Dalton Trans., 2015, 44, 12256
DOI: 10.1039/C5DT00217F

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