For the Coordination-insertion olefin polymerization, the development of high-performance transition-metal catalysts is always the key issue and extensive efforts have been made in this field. In this contribution, we designed several asymmetrical anilinotropone nickel and palladium catalysts. Compared to palladium complex, the nickel catalysts exhibited high activity in ethylene polymerization. The topology microstructure of polyethylene could be modulated by different polymerization temperature. The anilinotropone nickel catalysts and in this work demonstrated higher thermolability, generating polyethylene with higher molecular weight (up to 285.9 kg mol). Moreover, these nickel systems also promoted the copolymerization of ethylene with norbornene-type polar monomers (NB–COOMe, NB-OAc), which demonstrated great polar group tolerance in this system. The generated copolymer exhibited high molecular weight (up to 93.1 kg mol) and high polar monomer incorporation ratio (up to 6.9 mol%). The design of asymmetrical anilinotropone catalysts in this work presented a unique form in olefin polymerization and may attract wide application interests in metal catalysis areas.

中文翻译：

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用于烯烃聚合的不对称苯胺托酮镍钯配合物的合成

对于配位插入烯烃聚合来说，高性能过渡金属催化剂的开发一直是关键问题，人们在该领域做出了广泛的努力。在这篇文章中，我们设计了几种不对称苯胺托酮镍和钯催化剂。与钯配合物相比，镍催化剂在乙烯聚合中表现出较高的活性。聚乙烯的拓扑微观结构可以通过不同的聚合温度来调节。苯胺托酮镍催化剂在这项工作中表现出更高的热稳定性，产生更高分子量的聚乙烯（高达 285.9 kg mol）。此外，这些镍体系还促进了乙烯与降冰片烯型极性单体（NB-COOMe、NB-OAc）的共聚，在该体系中表现出良好的极性基团耐受性。生成的共聚物表现出高分子量（高达93.1 kg mol）和高极性单体掺入率（高达6.9 mol%）。这项工作中不对称苯胺托酮催化剂的设计在烯烃聚合中呈现出独特的形式，可能会在金属催化领域引起广泛的应用兴趣。