A family of three group IV based diamine bis(phenolate) catalysts, [M{2,2ʹ-(OC₆H₂-4,6-^tBu₂)₂NHC₂H₄NH}(OⁱPr)₂] (M = Ti (Cat1), Zr (Cat2), and Hf (Cat3)) were synthesized and characterized. These complexes were employed in 1-decene oligomerization using ([Ph₃C][B(C₆F₅)₄]) as an activator at 80 °C. NMR spectra of the di(isopropoxy) complexes confirmed C₂-symmetrical structures. Cat2 demonstrated the highest activity followed by Cat3 and Cat1, whereas tacticity Cat1>Cat2>Cat3. The origin of this different performance was unveiled by DFT calculations. Interestingly, the increase of oligomerization temperature shifted PDI to the higher values. Moreover, kinetic studies employing population balance approach have been conducted, being outstanding that initiation rate constants were lower than propagation ones by a factor of 100. The precise study of termination reactions by NMR revealed that the significant termination reaction was the creation of two types of unsaturated bonds, i.e. vinylidene and vinylene. The obtained oligomers had viscosity index and pour point values comparable with commercial oils.

三族基于四族的二胺双酚盐催化剂，[M {2,2ʹ-（OC ₆ H ₂ -4,6- ^t Bu ₂）₂ NHC ₂ H ₄ NH}（O ⁱ Pr）₂ ]]合成并表征了M ＝ Ti（Cat1），Zr（Cat2）和Hf（Cat3））。这些配合物在80°C下使用（[Ph ₃ C] [B（C ₆ F ₅）₄ ]）作为活化剂用于1-癸烯低聚反应。二（异丙氧基）配合物的NMR光谱证实了C ₂对称结构。2类表现出最高的活性，其次是Cat3和Cat1，而立构法Cat1 > Cat2 > Cat3。DFT计算揭示了这种不同性能的起源。有趣的是，低聚温度的升高将PDI移至更高的值。此外，已经进行了采用种群平衡方法的动力学研究，其杰出之处在于引发速率常数比传播速率常数低100倍。NMR对终止反应的精确研究表明，显着的终止反应是两种类型的不饱和键，即亚乙烯基和亚乙烯基。所得的低聚物的粘度指数和倾点值可与市售油相比。