自本世纪五十年代用烷基铝-氯化钛为催化剂的低压法聚乙烯出现以后,对有机铝-过渡金属衍生物的研究工作迅速展开。就目前所知,有机铝-过渡金属衍生物的重要性有两个方面。一方面,烷基铝等与ⅣB—ⅤB 族元素,如钛、锆、钒等电负性较小的过渡金属化合物 Since the advent of low-pressure polyethylene using alkyl aluminum chloride-titanium chloride as a catalyst in the 1950s, research on organoaluminum-transition metal derivatives has rapidly progressed. As far as we know, there are two aspects to the importance of organoaluminum-transition metal derivatives. On the one hand, transition metal compounds such as aluminum alkyls which are less electronegative with Group IVB-VB compounds such as titanium, zirconium and vanadium