Synthesis And Characterization Of Nickel, Palladium,Cobalt And Copper Complexes Supported By N^O Ligands And Catalyze The Vinyl Polymerization Of Norbornene

In this dissertation, twelve novel nickel, palladium, cobalt and copper complexes supported by [N,O] ligands have been synthesized and characterized. The crystal structures of seven complexes have been confirmed by the single crystal X-ray diffraction analysis. These complexes are applied to catalyze vinyl polymerization of norbornene (NB). The catalytic behaviors towards NB are investigated in detail under the polymerization parameters such as Al/M ratio, reaction temperature and monomer concentration. In addition, the structures and properties of polynorbornene (PNB) are characterized. The major research works are summarized as follows:1. The series of nickel, palladium, cobalt and copper complexes supported by [N,O] ligands have been synthesized and characterized. All ligands and complexes are characterized by IR and element analysis. The crystal structures of the ligand1and complexes2,5,6,8,9,10,11have been determined by single crystal X-ray diffraction analysis. Ligand2,3and complex7have been determined by1HNMR and Ms. Com-plexes1,3,4,12have been determined by Ms.2. After activation with MAO, the nickel complexes (C1, C5, C9) can be effectively catalyze NB polymerization and obtain high molecular weight polymers. In addition, palladium complexes also have catalytic activities, but the polymers show poor solubility in chlorobenzene. Cobalt and copper complexes have no catalytic activities. Complexes1,5,9are investigated for the polymerization of NB with various polymerization parameters. Under the optimal polymerization conditions, the highest catalytic activities are up to2.20×107g PNB·(mol of Ni)-1h-1.