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Issue 45, 2015
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Brønsted acid-promoted C–F bond activation in [P,S]-ligated neutral and anionic perfluoronickelacyclopentanes

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Abstract

Treatment of L2Ni(CF2)44a–c (L = PPh3, PPh2Me, pyridine) with an external Lewis acid (trimethylsilyl triflate) gives new L-functionalized fluoronickelacyclopentanes 5a–c. Complexes L2Ni(CF2)44a,b react with the thiol form of the bidentate ligand 1,2,4-(HS)(Ph2P)Me(C6H3) [P,SH] through a unique Brønsted acid-promoted Cα–F bond activation mechanism, affording phosphine-functionalized nickelacycles bearing a phosphinothiolate ligand 6a–b. Furthermore, substituting monodentate ligands in L2Ni(CF2)44a–c with the deprotonated form of the bidentate ligand [P,S] leads to the first anionic perfluoronickelacycle 7. The anionic metallacyle reacts with phosphonium salts [PHPh3](Br) and [PHPh2Me](Br) to yield HF and phosphine-functionalized nickelacycles 6a,b that still contain the terminal thiolate moiety.

Graphical abstract: Brønsted acid-promoted C–F bond activation in [P,S]-ligated neutral and anionic perfluoronickelacyclopentanes

  • This article is part of the themed collection: Fluorine
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Publication details

The article was received on 28 Jul 2015, accepted on 14 Sep 2015 and first published on 24 Sep 2015


Article type: Paper
DOI: 10.1039/C5DT02912K
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Dalton Trans., 2015,44, 19587-19596

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    Brønsted acid-promoted C–F bond activation in [P,S]-ligated neutral and anionic perfluoronickelacyclopentanes

    K. A. Giffin, I. Korobkov and R. T. Baker, Dalton Trans., 2015, 44, 19587
    DOI: 10.1039/C5DT02912K

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