Abstract
Metal–metal bonded Rh2 and Ru2 complexes having a paddlewheel-type structure are exceptional catalysts for a broad range of organic transformations. I review here the recent efforts towards the observation and characterization of intermediates in these reactions that have previously eluded detection. Specifically, mechanistic investigations of carbenoid and nitrenoid reactions of Rh2(II,II)-tetracarboxylate compounds have led to the observation of a metastable Rh2(II,II) carbene complex as well as a mixed-valent Rh2(II,III)-amido intermediate. Related Ru2 nitrido compounds have been studied and found to undergo intramolecular C–H amination reactions as well as intermolecular reaction with triphenylphosphine.
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Acknowledgements
I thank the US Department of Energy and the National Science Foundation for supporting my research under the following grants: DE-FG02-10ER16204, CHE-1205646, and CHE-1300464.
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BERRY, J.F. Metal–metal multiple bonded intermediates in catalysis. J Chem Sci 127, 209–214 (2015). https://doi.org/10.1007/s12039-015-0773-6
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DOI: https://doi.org/10.1007/s12039-015-0773-6