Three novel hexacoordinated nickel catalysts containing salicylaldbenzhydrylimine ligand and tetrahydrofuran heterocycle, Ni{(THF) (3-R₁) (5-R₂)C₆H₂(O)CHNCH(C₆H₅)₂}₂, (R₁ = Br, R₂ = H, Ni1; R₁ = Br, R₂ = Br, Ni2; R₁ = Cl, R₂ = Cl, Ni3.), were synthesized and their molecular structures were confirmed by X-ray crystallography. Ni1–Ni3 catalysts exhibited high activities (0.53–2.11 × 10⁶ g_polymer/mol_Ni·h) toward norbornene homopolymerization and high activity (0.29–2.62 × 10⁵ g_polymer/mol_Ni·h) to copolymerization of norbornene and 1-hexene. When the 1-hexene feed ratio was changed from 10 to 70%, the 1-hexene content in the obtained copolymers could be controlled to 8.23–26.58%. The Ni3 with R₁ and R₂ were both electron withdrawing groups (-Cl) on the aromatic ring of salicylaldehyde, showed the highest activity as well as the highest 1-hexene insert ratios. At the same time, only a small amount of B(C₆F₅)₃ cocatalyst (5 × 10⁻⁵ mol) need to be consumed in the copolymerization process. In addition, the obtained copolymers had a high thermal decomposition temperature (T_d > 386 °C) and a low glass transition temperature (T_g = 208.67–237.42 °C), which showed that the processability of these polymers was improved while the high thermal decomposition temperature was kept. The copolymers also exhibited good solubility in general organic solvents and high optical transparency in the visible region.

三种新的六配位镍催化剂，其中含有水杨醛苯并嘧啶配体和四氢呋喃杂环，Ni {（THF）（3-R ₁）（5-R ₂）C ₆ H ₂（O）CHNCH（C ₆ H ₅）₂ } ₂，（R ₁ 为Br，R ₂  = H，NI1 ; R ₁  = Br的，R ₂  = Br的，NI2 ; R ₁  =氯，R ₂  =氯，的Ni3），合成，并通过X-射线结晶学证实其分子结构。Ni1-Ni3催化剂对降冰片烯均聚表现出高活性（0.53–2.11×10 ⁶ g_聚合物/ mol _Ni ·h），对降冰片烯和1-己烯的共聚具有高活性（0.29–2.62×10 ⁵ g_聚合物/ mol _Ni ·h）。当1-己烯的进料比例从10％更改为70％时，所得共聚物中的1-己烯含量可以控制在8.23-26.58％。具有R ₁和R ₂的Ni3都是水杨醛芳环上的吸电子基团（-Cl），显示出最高的活性以及最高的1-己烯插入率。同时，只有少量的B（C ₆ F₅） 在共聚过程中需要消耗₃助催化剂（5×10 ^-5 mol）。此外，所获得的共聚物具有较高的热分解温度（T _d  > 386°C）和较低的玻璃化转变温度（T _g  = 208.67–237.42°C），这表明这些聚合物的加工性得到了改善，而高保持热分解温度。该共聚物还显示出在一般有机溶剂中的良好溶解性，以及在可见光区域的高光学透明性。