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Chimie moléculaire Paris Centre

Combining N-heterocyclic carbenes (NHCs) with oxophilic and earth-abundant metal centers: fundamental reactivity and use in homogeneous catalysis

Séminaire du Dr Samuel Dagorne (Institut de Chimie, CNRS - Université de Strasbourg)


The development of earth-abundant, affordable and low toxic metal-based catalysts is of current strategic importance for sustainable catalytic processes. In this context, the organometallics of oxophilic and high-oxidation state metal centers, such as Zn(II) and Al(III), holds a particular interest in catalysis. However, such entities may display a limited hydrolytic stability, prompting our studies on derivatives stabilized by N-heterocyclic-carbenes (which are exceptional s-donating properties) for improved robustness. In the present seminar, discrete NHC-Zn(II) and NHC-Al(III) species are described along with their reactivity trends. As will be discussed, such rather simple coordination complexes may be involved in various chemical transformations ranging from unusual fundamental reactivity (rearrangement processes), small molecules activation (H2, CO2) and homogeneous catalysis (cyclic esters/carbonates polymerization, CO2 hydrosilylation catalysis).


Selected refs: Chem. Commun. 2010, 46, 2480; ChemCatChem 2014, 6, 1357; Chem. Eur. J. 2015, 21, 17959; Organometallics 2016, 35, 1726; Chem. Eur. J. 2017, 23, 5509; Chem. Eur. J. 2017, 23, 15908.


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