title: Platinum(II) N-heterocyclic carbene complexes: coordination and cyclometallation.
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.
authors.affiliation: Department of Chemistry, University of Warwick, Coventry, UK CV4 7AL.
authors.forename: Giacomo L
authors.initials: GL
authors.lastname: Petretto
authors.forename: Miao
authors.initials: M
authors.lastname: Wang
authors.forename: Antonio
authors.initials: A
authors.lastname: Zucca
authors.forename: Jonathan P
authors.initials: JP
authors.lastname: Rourke