The present invention provides a novel transition metal complex where a monocy-clopentadienyl ligand to which an amido group is introduced is coordinated, a method for synthesizing the complex, and olefin polymerization using the same. The method for preparing a transition metal complex according to the present invention comprises a step of blocking a by-reaction of a nitrogen atom using a compound containing a protecting group, and thus it is possible to prepare a transition metal complex in a simpler manner in a high yield. Further, the transition metal complex according to the present invention has a pentagon ring structure having an amido group connected by a phenylene bridge in which a stable bond is formed in the vicinity of a metal site, and thus, sterically monomers can easily approach the transition metal complex. When a catalyst composition comprising the transition metal complex is applied in copoly-merization of ethylene and monomers having large steric hindrance, a very low density polyolefin copolymer having a density of less than 0.910 g/cc, in addition to a polyolefin having a high molecular weight and a linear low density, can be prepared. Furthermore, the reactivity is also very high.
本发明提供了一种新型的过渡
金属配合物,其中协同作用的是引入了
氨基基团的单
环戊二烯基
配体,以及合成该配合物的方法和使用该配合物进行烯烃聚合的方法。根据本发明的制备过渡
金属配合物的方法包括使用含有保护基的化合物阻止氮原子的副反应的步骤,因此可以以高产率简单地制备过渡
金属配合物。此外,本发明的过渡
金属配合物具有一个五边形环结构,其中通过苯基桥连接的
氨基基团在
金属位点附近形成了稳定的键,因此,立体单体可以轻松接近过渡
金属配合物。当将含有该过渡
金属配合物的催化剂组合物应用于
乙烯和立体位阻较大的单体的共聚合物化反应中时,可以制备密度小于0.910 g / cc的超低密度聚烯烃共聚物,除了高分子量和线性低密度聚烯烃外,反应活性也非常高。