中文摘要：

为乙烯聚合和 oligomerization 的迟了转变的金属建筑群的研究在最后二十年吸引了很多注意。有对称的 diimine ligands 的很多迟了转变的金属建筑群广泛地被学习了。尽管 unsymmetric diimine 的研究迟了转变的金属建筑群仍然在起始的阶段，一些优异表演在石蜡聚合被观察。在迟了转变的金属建筑群与 unsymmetric diimine ligands 催化的乙烯聚合和 oligomerization 的研究的最近的开发在这评论被总结，与分析的催化剂的催化性能上的复杂结构的影响。

英文摘要：

Researches of late-transition metal complexes for ethylene polymerization and oligomerization have attracted a lot of attention in the last two decades. A large number of late-transition metal complexes with symmetric diimine ligands have been extensively studied. Although the research of unsymmetric diimine late-transition metal complexes was still in the initial stage, some superior performances were observed in olefin polymerization. Recent developments in the research of ethylene poly- merization and oligomerization catalyzed by late-transition metal complexes with unsymmetric diimine ligands were summarized in this review, with the influence of complex structure on the catalytic performance of the catalyst analyzed.