In the last few decades, ethylene complexes of transition metals have become relevant due to their industrial importance as intermediates and catalysts in a wide range of reactions.1 In the context of the ethylene-carbon dioxide coupling reaction en route to acrylic acid derivatives, very few complexes have been described to promote such transformation 2.Whereas nickel-based systems have provided catalytic reactions, molybdenum and tungsten derivatives are yet restricted to stoichiometric transformations between C2H4 and CO2 3. We have revisited this chemistry with the objective to understand the C2H4-CO2 interaction. In this communication, we present the synthesis and characterization of the first tris(ethylene) complexes of Mo(0) and W(0) bearing a PNP-type pincer ligand and the study of their reactivity with carbon dioxide. Preliminary studies have shown that mono-(carbon dioxide), bis(ethylene) complexes are formed (Scheme 1), both in solution as well as in the solid-state.

Stable ethylene-carbon dioxide group 6 metal complexes

2019 Fall National Meeting

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