Unexpected nickel complex speciation unlocks alternative pathways for the reactions of alkyl halides with dppf-nickel(0)

Greaves, Megan E. and Ronson, Thomas O. and Lloyd-Jones, Guy C. and Maseras, Feliu and Sproules, Stephen and Nelson, David J. (2020) Unexpected nickel complex speciation unlocks alternative pathways for the reactions of alkyl halides with dppf-nickel(0). ACS Catalysis, 10 (18). pp. 10717-10725. ISSN 2155-5435 (https://doi.org/10.1021/acscatal.0c02514)

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Abstract

The mechanism of the reactions between dppf-Ni0 complexes and alkyl halides has been investigated using kinetic and mechanistic experiments and DFT calculations. The active species is [Ni(κ2-dppf)(κ1-dppf)], which undergoes a halide abstraction reaction with alkyl halides and rapidly captures the alkyl radical that is formed. The rates of the reactions of [Ni(COD)(dppf)] with alkyl halides and the yields of prototypical nickel-catalyzed Kumada cross-coupling reactions of alkyl halides are shown to be significantly improved by the addition of free dppf ligand.

ORCID iDs

Nelson, David J. ORCID: https://orcid.org/0000-0002-9461-5182

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  Item type:	Article
  ID code:	73739
  Dates:	Date Event 18 September 2020 Published 21 August 2020 Published Online 21 August 2020 Accepted
  Subjects:	Science > Chemistry
  Department:	Faculty of Science > Pure and Applied Chemistry
  Depositing user:	Pure Administrator
  Date deposited:	28 Aug 2020 13:36
  Last modified:	11 Nov 2024 12:48
  URI:	https://strathprints.strath.ac.uk/id/eprint/73739