以三烷基钪Sc(CH2 SiMe3)3(THF)2和胺基膦亚胺配体为原料,经烷基消去反应合成了亚胺膦亚胺(NPN)型配体螯合钪烷基配合物.其结构用1 H NMR、13C NMR、元素分析和X射线衍射分析进行了表征.在助催化剂有机硼盐和烷基铝的作用下,该配合物对丁二烯聚合表现出了较高的催化活性.并且随着聚合温度的降低,催化剂的1,2-选择性也随之升高.聚合温度为-75 ℃时,产物的1,2-结构含量高达98.0％,聚合物的分子量为2.95×104,分子量分布为1.65.
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