4.7 Article

Alkyl dehydrogenation in a Rh(I) complex via an isolated agostic intermediate

Journal

CHEMICAL COMMUNICATIONS
Volume -, Issue 2, Pages 244-246

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/b816739g

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Funding

  1. EPSRC [EP/E050743/1, EP/D055016/1, EP/E048994/1] Funding Source: UKRI
  2. Engineering and Physical Sciences Research Council [EP/E048994/1, EP/D055016/1, EP/E050743/1] Funding Source: researchfish

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A well-characterised 14-electron rhodium phosphine complex, [Rh((PPr3)-Pr-i)(3)][BAr4F], which contains a beta-CH agostic interaction, is observed to undergo spontaneous dehydrogenation to afford [Rh((PPr3)-Pr-i)(2)((PPr2)-Pr-i(C3H5))][BAr4F]; calculations on a model system show that while C-H activation is equally accessible from the beta-CH agostic species or an alternative gamma-CH agostic isomer, subsequent beta-H-transfer can only be achieved along pathways originating from the beta-CH agostic form.

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