在计算钛(Ⅲ)—氯络离子DSPF微扰d能级的基础上,提出一种乙烯聚合的钛催化作用机理。对不同构型的钛(Ⅲ)—氯络离子的催化活性进行了讨论,预示缺位四方单锥构型应具有最高的催化活性。对载体化的Ziegler-Natta催化剂的高活性,提出了一个链式多核钛原子簇催化机理。 On the basis of calculating the d-level of the dodecadiated titanium (Ⅲ) -chloro complex ion DSPF, a mechanism of titanium polymerization catalyzed by ethylene was proposed. The catalytic activities of titanium (Ⅲ) -chloride ions with different configurations were discussed, indicating that the vacancy tetragonal single-cone configuration should have the highest catalytic activity. For the high activity of supported Ziegler-Natta catalysts, a catalytic mechanism of chain-like multi-core titanium clusters has been proposed.