| 초록 |
We have synthesized series of Pd(II) complexes with ligands LA, LB and LC where LA is (E)-3-methoxy-N-(quinolin-2-ylmethylene)propan-1-amine, LB is (E)-N1,N1-dimethyl-N2-(pyridin-2-ylmethylene)ethane-1,2-diamine and LC (E)-N-(pyridin-2-ylmethylene)hexan-1-amine. All complexes were characterized by 1H-NMR, 13C-NMR, IR, elemental analyzer and single crystal X-ray diffraction. All complexes adopted distorted square planar geometry around palladium metal center. The catalytic properties of these complexes toward the polymerization of cyclic olefins such as norbornene (NBE) and norbornene derivatives in the presence of modified methylaluminoxane (MMAO) were also investigated. Specifically, all precatalysts showed a high polymer yield of over 90% from 1:1000 to 1:8000 ratio ([catalyst]: [monomer]) in the polymerization of NBE. |
