Dehydrogenative Double C−H Bond Activation in a Germylene-Rhodium Complex**

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Abstract

Transition metal tetrylene complexes offer great opportunities for molecular cooperation due to the ambiphilic character of the group 14 element. Here we focus on the coordination of germylene [(ArMes2)2Ge :] (ArMes=C6H3-2,6-(C6H2-2,4,6-Me3)2) to [RhCl(COD)]2 (COD=1,5-cyclooctadiene), which yields a neutral germyl complex in which the rhodium center exhibits both η6- and η2-coordination to two mesityl rings in an unusual pincer-type structure. Chloride abstraction from this species triggers a singular dehydrogenative double C−H bond activation across the Ge/Rh motif. We have isolated and fully characterized three rhodium-germyl species associated to three C−H cleavage events along this process. The reaction mechanism has been further investigated by computational means, supporting the key cooperative action of rhodium and germanium centers.

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Bajo, S., Alcaide, M. M., López-Serrano, J., & Campos, J. (2021). Dehydrogenative Double C−H Bond Activation in a Germylene-Rhodium Complex**. Chemistry - A European Journal, 27(66), 16422–16428. https://doi.org/10.1002/chem.202102529

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