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Synthesis and Characterization of Rhodium Complexes with Phosphine-Stabilized Germylenes

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journal contribution
posted on 06.08.2012, 00:00 by Juan M. García, Edgar Ocando-Mavárez, Tsuyoshi Kato, David Santiago Coll, Alexander Briceño, Nathalie Saffon-Merceron, Antoine Baceiredo
The reaction of phosphine-stabilized germylenes (1a,b) with dimer complex [Rh2(μ-Cl)2(COD)2] leads to the corresponding phosphine–germylene–Rh­(I) complexes (2a,b). Interestingly, the stability of these complexes depends strongly on the nature of the substituent of the germylene fragment. Indeed, the complex (2a) with the chloro-germylene ligand isomerizes into a metallacycle rhodium complex (3a) via germylene insertion into the Rh–Cl bond, while the complex with the phenyl-substituted germylene (2b) was isolated and represents the first stable Rh­(I)–germylene complex with a Rh–Cl bond.

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