N-Heterocyclic carbene stabilized aluminium alkyls and their reactivity towards NHC-alanes

Burnett, Stuart and Kennedy, Alan R. and Weetman, Catherine E. (2026) N-Heterocyclic carbene stabilized aluminium alkyls and their reactivity towards NHC-alanes. Organometallics, 45 (1). 90–95. ISSN 0276-7333 (https://doi.org/10.1021/acs.organomet.5c00409)

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Abstract

Herein, we report the synthesis of several new NHC-stabilized aluminium alkyl species [NHCAlR3] (for NHC = ICy, R = Me, iBu; NHC = IMes and IDip, R = iBu) via coordination of the respective free carbene to AlMe3 or AliBu3. Attempts to access Al-Al bonded species (dialumanes) via reactions with the respective NHCAlH3 complexes did not yield the desired Al(II) complexes via R-H elimination, instead yielding the R/H ligand scrambled complexes NHCAlR2H and NHCAlRH2, respectively. These mixed ligand species were characterized by 1H, 13C{1H} and multinuclear NMR spectroscopy, with select cases characterized by single-crystal X-ray diffraction studies.

ORCID iDs

Burnett, Stuart ORCID logoORCID: https://orcid.org/0009-0008-7124-2169, Kennedy, Alan R. ORCID logoORCID: https://orcid.org/0000-0003-3652-6015 and Weetman, Catherine E. ORCID logoORCID: https://orcid.org/0000-0001-5643-9256;