Treatment of the o-hydroxyaryl imidazolinium pro-ligands (2-OH-3,5- 5), Ph (6), Mes (7), t Bu (8)]. Notably, without isolating 2, complexes 4-8 could also be obtained by one-pot, threecomponent, sequential reaction of N,N-dimethylbenzylamine, PdCl 2 , and the pro-ligands in refluxing acetonitrile in the presence of K 2 CO 3 . When the N-functional group on the NHCs is tert-butyl, the NHC in 8 adopts an abnormal binding (C4-bonding). All these complexes were fully characterized by 1 H and 13 C NMR, high-resolution mass spectrometry (HRMS), and elemental analysis. Singlecrystal X-ray diffraction analysis results further confirmed the molecular structures of 4-8 and the abnormal binding of NHC in 8. With methylaluminoxane (MAO) as cocatalyst these palladacycles showed excellent catalytic activities up to 10 7 g of PNB (mol of Pd) -1 h -1 in the addition polymerization of norbornene.

No abstract

No abstract

No abstract