Synthesis and Characterization of Rhodium Complexes with Phosphine-Stabilized Germylenes
journal contributionposted 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.