An isolable, chelating bis[cyclic (alkyl)(amino)carbene] stabilizes a strongly bent, dicoordinate Ni(0) complex

Braulio M. Puerta Lombardi, Morgan R. Faas, Daniel West, Roope A. Suvinen, Heikki M. Tuononen () and Roland Roesler ()
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Braulio M. Puerta Lombardi: University of Calgary, 2500 University Drive NW
Morgan R. Faas: University of Calgary, 2500 University Drive NW
Daniel West: University of Calgary, 2500 University Drive NW
Roope A. Suvinen: University of Jyvӓskylӓ
Heikki M. Tuononen: University of Jyvӓskylӓ
Roland Roesler: University of Calgary, 2500 University Drive NW

Nature Communications, 2024, vol. 15, issue 1, 1-7

Abstract: Abstract Chelating ligands have had a tremendous impact in coordination chemistry and catalysis. Notwithstanding their success as strongly σ-donating and π-accepting ligands, to date no chelating bis[cyclic (alkyl)(amino)carbenes] have been reported. Herein, we describe a chelating, C2-symmetric bis[cyclic (alkyl)(amino)carbene] ligand, which was isolated as a racemic mixture. The isolation and structural characterization of its isostructural, pseudotetrahedral complexes with iron, cobalt, nickel, and zinc dihalides featuring eight-membered metallacycles demonstrates the binding ability of the bis(carbene). Reduction of the nickel(II) dibromide with potassium graphite produces a dicoordinate nickel(0) complex that features one of the narrowest angles measured in any unsupported dicoordinate transition metal complexes.

Date: 2024
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DOI: 10.1038/s41467-024-47036-7

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