Four different NHC ligands have been coordinated to Pt(II) centres; for the first time cyclometallation of the NHC ligand was observed, but only when the platinum centre had a DMSO and two methyl co-ligands. Cyclometallation resulted in the exclusive formation of five-membered rings, and the absence of any double cyclometallation reactions with appropriate ligands rules out the possibility of an oxidative addition type mechanism for the cyclometallation reaction.
Platinum(II) N-heterocyclic carbene complexes: coordination and Cyclometallation / Petretto, Giacomo Luigi; Miao, Wang; Jonathan P., Rourke; Zucca, Antonio. - In: DALTON TRANSACTIONS. - ISSN 1477-9226. - 39:33(2010), pp. 8.7822-8.7825. [10.1039/c0dt00435a]
Platinum(II) N-heterocyclic carbene complexes: coordination and Cyclometallation
PETRETTO, Giacomo Luigi;ZUCCA, Antonio
2010-01-01
Abstract
Four different NHC ligands have been coordinated to Pt(II) centres; for the first time cyclometallation of the NHC ligand was observed, but only when the platinum centre had a DMSO and two methyl co-ligands. Cyclometallation resulted in the exclusive formation of five-membered rings, and the absence of any double cyclometallation reactions with appropriate ligands rules out the possibility of an oxidative addition type mechanism for the cyclometallation reaction.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
