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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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Publication details

The article was received on 16 Jan 2015, accepted on 06 Mar 2015 and first published on 11 Mar 2015


Article type: Paper
DOI: 10.1039/C5DT00217F
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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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