我们曾指出,在NdCl_3·3ROH-AlEt_3体系中,醇的作用在于它的给电子性将会降低稀土离子的正电性,从而减弱Nd-Cl键的离子性,同时引起晶格的变化,使之有利于烷基化作用的发生,导致活性提高。本实验采用一种简便的方法证实了这种作用的发生。 这个方法所根据的原理是一般Ziegler-Natta型催化组分的熟知反应形式: We have pointed out that in the NdCl 3 · 3ROH-AlEt 3 system, the effect of the alcohol is that its electron donation will reduce the positive charge of the rare earth ions, thereby weakening the ionicity of the Nd-Cl bond and causing the lattice changes It is conducive to the occurrence of alkylation, resulting in increased activity. This experiment uses a simple method to confirm the occurrence of this effect. The rationale behind this method is the well-known reaction of the general Ziegler-Natta type catalytic component: