2,6-Dibenzhydryl- N -(2-phenyliminoacenaphthylenylidene)-4-methylbenzenamine Nickel Dibromides: Synthesis, Characterization, and Ethylene Polymerization

A series of 2,6-dibenzhydryl- N -(2-phenyliminoacenaphthylenylidene)-4-methylbenzenamines ( L1 − L5 ) and the nickel(II) dibromide complexes thereof ( C1 − C5 ) were synthesized and fully characterized. The molecular structures of representative complexes were determined by single-crystal X-ray diffraction and revealed a distorted-pyramidal geometry at nickel. All nickel(II) procatalysts exhibited very high activity for the polymerization of ethylene, with activities as high as the range of 10 7 g of PE (mol of Ni) −1 h −1 .