The axial and equatorial plane model has been widely accepted for α-diimine nickel and palladium catalysts of olefins polymerization. In this paper, dinaphthobarrelene backbone-based α-diimine nickel and palladium complexes with the constrained space were designed and synthesized from the viewpoint of three-dimensional (3D) space. The 3D-constrained microenvironment around the Ni/Pd metal center created by the bulky ligand substituents fully shielded the back and axial sites, which improved catalytic activity, thermal stability, and living fashion of catalysts. Additionally, enhanced tolerance towards polar groups in copolymerization of ethylene and polar monomers was realized by dinaphthobarrelene-derived α-diimine nickel and palladium catalysts.

轴向和赤道平面模型已被烯烃聚合的α-二亚胺镍和钯催化剂广泛接受。本文从三维（3D）空间的观点出发，设计并合成了空间受限的二萘并萘骨架的α-二亚胺镍钯复合物。由庞大的配体取代基围绕Ni / Pd金属中心形成的3D约束的微环境完全屏蔽了背面和轴向位点，从而改善了催化剂的催化活性，热稳定性和活性。另外，通过萘并萘嵌苯衍生的α-二亚胺镍和钯催化剂实现了对乙烯和极性单体的共聚中的极性基团的更高的耐受性。