Oxidative Addition of Aryl Halides to a Triphosphine Ni(0) Center to Form Pentacoordinate Ni(II) Aryl Species

Oxidative Addition of Aryl Halides to a Triphosphine Ni(0) Center to Form Pentacoordinate Ni(II) Aryl Species

Oxidative addition of aryl halides to Ni(0) is a ubiquitous elementary step in cross-coupling and related reactions, usually producing a square-planar Ni(II)-aryl intermediate. Here we show that a triphosphine ligand supports oxidative addition at a tris-ligated Ni(0) center to cleanly form stable f...

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Veröffentlicht in:ORGANOMETALLICS 2020-04, Vol.39 (8), p.1139-1144
Hauptverfasser: Perez-Garcia, Pablo M, Daru, Andrea, Scheerder, Arthur R, Lutz, Martin, Harvey, Jeremy N, Moret, Marc-Etienne
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container_issue 8
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container_title ORGANOMETALLICS
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creator Perez-Garcia, Pablo M
Daru, Andrea
Scheerder, Arthur R
Lutz, Martin
Harvey, Jeremy N
Moret, Marc-Etienne
description Oxidative addition of aryl halides to Ni(0) is a ubiquitous elementary step in cross-coupling and related reactions, usually producing a square-planar Ni(II)-aryl intermediate. Here we show that a triphosphine ligand supports oxidative addition at a tris-ligated Ni(0) center to cleanly form stable five-coordinate Ni(II)-aryl compounds. Kinetic and computational studies support a concerted, two-electron mechanism rather than radical halogen abstraction. These results support the idea that oxidative addition to triphosphine Ni(0) species may be more generally involved in Ni/phosphine catalytic systems.
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title Oxidative Addition of Aryl Halides to a Triphosphine Ni(0) Center to Form Pentacoordinate Ni(II) Aryl Species
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