Amine–Imine Nickel Catalysts with Pendant O-Donor Groups for Ethylene (Co)Polymerization
Yanbing Wang, Chenlong Nan, Weize Zhuo, Chen Zou, Hui Jiang, Xin‐Qi Hao, Changle Chen, Mao‐Ping Song
Abstract
The introduction of a secondary interaction is an efficient strategy to modulate transition-metal-catalyzed ethylene (co)polymerization. In this contribution, O-donor groups were suspended on amine–imine ligands to synthesize a series of nickel complexes. By adjusting the interaction between the nickel metal center and the O-donor group on the ligands, these nickel complexes exhibited high activities for ethylene polymerization (up to 3.48 × 10 6 g PE ·mol Ni –1 ·h –1 ) with high molecular weight up to 5.59 × 10 5 g·mol –1 and produced good polyethylene elastomers (strain recovery (SR) = 69–81%). In addition, these nickel complexes can catalyze the copolymerization of ethylene with vinyl acetic acid, 6-chloro-1-hexene, 10-undecylenic, 10-undecenoic acid, and 10-undecylenic alcohol to prepare the functionalized polyolefins.