In this contribution, the influence of substitutions ranging from electron donating to the electron withdrawing, on the bis(arylimino)acenaphthenes-palladium catalysts is investigated. A series of symmetrical bis(arylimino)acenaphthene-palladium complexes, [1,2-bis[2,6-(CHPh₂)₂-4-R-C₆H₂N]C₂C₁₀H₆]PdMeCl (R = Me L1, Et L2, ⁱPr L3, ^tBu L4, Cl L5, F L6) has been prepared and investigated toward the polymerization of nobornene as well as its copolymerization with ethylene comonomer. These palladium complexes displayed moderate to high activities for norbornene polymerization in the presence of MAO and (C₆F₅)₄B.C₆H₅NH(CH₃)₂ co-catalysts. Specifically, complex Pd4 (R = ^tBu) displayed a highest activity up to 6.1 × 10⁶ g_PNBE mol^-1_Pd h^-1 with 54.2% conversion of monomer at 60 °C and showed exceptionally high thermal stability (act: 4.81 × 10⁵ g_PNBE mol^-1_Pd h^-1 with 51.2% conversion at 100 °C), and generating insoluble polynorbornene. Toward the copolymerization of norbornene-ethylene, Pd4 exhibited good activities with high incorporation of ethylene (up to 49.1%) and the resultant copolymer showed high molecular weights as high as 100.3 kg/mol^-1 with narrow molecular weights distributions (PDI = 2.15).

在该贡献中，研究了从给电子到吸电子的取代对双（芳基））啶-钯催化剂的影响。一系列对称的双（芳基）acena-钯络合物[1,2-双[2,6-（CHPh ₂）₂ -4-RC ₆ H ₂ N] C ₂ C ₁₀ H ₆ ] PdMeCl（R = Me L1，Et L2，ⁱ Pr L3，^t Bu L4，Cl L5，F L6）已制备并研究了降冰片烯的聚合及其与乙烯共聚单体的共聚反应。这些钯配合物在MAO和（C ₆ F ₅）₄ B.C ₆ H ₅ NH（CH ₃）₂助催化剂存在下，对降冰片烯聚合反应显示中等至高的活性。具体而言，复合物Pd4（R = ^t Bu）在6.1×10 ⁶ g _PNBE mol ^-1 _Pd h ^-1时表现出最高的活性，在60°C时单体转化率为54.2％，并显示出极高的热稳定性（作用：4.81× 10⁵ g _PNBE mol ^-1 _Pd h ^-1，在100°C时有51.2％的转化率，并生成不溶的聚降冰片烯。在降冰片烯-乙烯的共聚过程中，Pd4表现出良好的活性，其中乙烯的掺入率高（高达49.1％），所得共聚物的分子量高达100.3 kg / mol ^-1，分子量分布窄（PDI = 2.15）。 。