Synthesis of Palladium(II) complexes containing phosphine and NHC ligands with bulky aryl group and their catalytic activity towards norbornene polymerization

초록

Pd(II) complexes containing various NHC(N-heterocyclic carbene) ligands have been successfully synthesized by the reaction with phosphines.Treatments of dinuclear NHC-Pd complexes ( [Pd(μ-Cl)Cl(NHC)]2, (NHCs=IPr,IXy,IMes) ) with phosphine such as PPh3 resulted in new Pd(NHC)(PPh3)Cl2 complexes and these complexes are characterized by NMR and elemental anaylsis.Moreover, these new palladium complexes showed moderate to good catalytic activities towards norbornene polymerization.