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Issue 27, 2015
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Synthesis and Lewis acidity of fluorophosphonium cations

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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.

Graphical abstract: Synthesis and Lewis acidity of fluorophosphonium cations

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Article information


Submitted
16 Jan 2015
Accepted
06 Mar 2015
First published
11 Mar 2015

Dalton Trans., 2015,44, 12256-12264
Article type
Paper
Author version available

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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