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