Synthesis of a Square-Planar Rhodium Alkylidene N-Heterocyclic Carbene Complex and its Reactivity Towards Alkenes - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Organometallics Année : 2011

Synthesis of a Square-Planar Rhodium Alkylidene N-Heterocyclic Carbene Complex and its Reactivity Towards Alkenes

Résumé

The first rhodium alkylidene square-planar complex stabilized by an N-heterocyclic carbene ligand, RhCl(═CHPh)(IPr)PPh3 (2; IPr = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-carbene), has been prepared by reaction of RhCl(IPr)(PPh3)2 (1) with phenyldiazomethane and its dynamic behavior in solution studied. Treatment of 2 with alkenes results in the formation of the η2-olefin complexes RhCl(η2-CH2═CHR)(IPr)PPh3 (3, R = H; 4, R = Ph; 5, R = OEt) and new olefins arising from the coupling of the alkylidene with the alkenes, likely via a metallacyclobutane intermediate.

Domaines

Catalyse

Dates et versions

hal-00652038 , version 1 (14-12-2011)

Identifiants

Citer

Laura Palacios, Xiaowei Miao, Andrea Di Giuseppe, Simon Pascal, Carmen Cunchillos, et al.. Synthesis of a Square-Planar Rhodium Alkylidene N-Heterocyclic Carbene Complex and its Reactivity Towards Alkenes. Organometallics, 2011, 30 (19), pp.5208-5213. ⟨10.1021/om2005782⟩. ⟨hal-00652038⟩
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