Enhancing the Activity and Thermal Stability of Nickel Complex Precatalysts Using 1‑[2,6-Bis(bis(4-fluorophenyl)methyl)-4-methyl phenylimino]-2-aryliminoacenaphthylene Derivatives

The
series of acenaphthylene-1-[2,6-bis­(bis­(4-fluorophenyl)­methyl)-4-methylphenylimino]-2-arylimine
derivatives and their dichloronickel complexes were synthesized and
fully characterized as well as the single-crystal X-ray diffraction
of representative nickel complexes, revealing a distorted tetrahedral
geometry. Upon activation with either MAO or Et2AlCl, all
nickel complexes showed high activities in ethylene polymerization;
moreover, their catalytic systems showed better thermal stabilities
on being manipulated at 80 °C as the industrial operating temperature.