Potassium Aluminyl Promoted Carbonylation of Ethene

Matthew J. Evans, Samuel E. Neale, Mathew D. Anker, Claire L. McMullin, Martyn P. Coles

Research output: Contribution to journalArticlepeer-review


The potassium aluminyl [K{Al(NONDipp)}]2 ([NONDipp]2−=[O{SiMe2NDipp}2]2−, Dipp=2,6-iPr2C6H3) activates ethene towards carbonylation with CO under mild conditions. An isolated bis-aluminacyclopropane compound reacted with CO via carbonylation of an Al−C bond, followed by an intramolecular hydrogen shift to form K2[Al(NONDipp)(μ-CH2CH=CO-1κ2C1,3-2κO)Al(NONDipp)Et]. Restricting the chemistry to a mono-aluminium system allowed isolation of [Al(NONDipp)(CH2CH2CO-κ2C1,3)], which undergoes thermal isomerisation to form the [Al(NONDipp)(CH2CH=CHO-κ2C,O)] anion. DFT calculations highlight the stabilising influence of incorporated benzene at multiple steps in the reaction pathways.

Original languageEnglish
Article numbere202117396
JournalAngewandte Chemie-International Edition
Issue number16
Early online date14 Feb 2022
Publication statusPublished - 11 Apr 2022


  • Aluminyl Anions
  • Bimetallic Complexes
  • Carbonylation
  • Hydrogen-Shift
  • Metallacycles

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)


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