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Journal Article

An Anionic Dinuclear Ruthenium Dihydrogen Complex of Relevance for Alkyne gem-Hydrogenation

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Biberger,  Tobias
Research Department Fürstner, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Nöthling,  Nils
Service Department Lehmann (EMR), Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Leutzsch,  Markus
Service Department Farès (NMR), Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Fürstner,  Alois
Research Department Fürstner, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Citation

Biberger, T., Nöthling, N., Leutzsch, M., Gordon, C. P., Copéret, C., & Fürstner, A. (2022). An Anionic Dinuclear Ruthenium Dihydrogen Complex of Relevance for Alkyne gem-Hydrogenation. Angewandte Chemie International Edition, 61(24): e202201311. doi:10.1002/anie.202201311.


Cite as: https://hdl.handle.net/21.11116/0000-000A-A16C-7
Abstract
During an investigation into the fate of ruthenium precatalysts used for light-driven alkyne gem-hydrogenation reactions with formation of Grubbs-type ruthenium catalysts, it was found that the reaction of [(IPr)(η6-cymene)RuCl2] with H2 under UV-irradiation affords an anionic dinuclear σ-dihydrogen complex, which is thermally surprisingly robust. Not only are anionic σ-complexes in general exceedingly rare, but the newly formed species seems to be the first example lacking any structural attributes able to counterbalance the negative charge and, in so doing, prevent oxidative insertion of the metal centers into the ligated H2 from occurring.