Abstract
AbstractNickel catalyzed copolymerization of olefins with polar co‐monomers remains a great challenge in the field of olefin polymerization. In this contribution, a series of amidine/phosphine‐oxide‐based ligands were synthesized and investigated for nickel catalyzed ethylene polymerization and copolymerization with polar co‐monomers. These nickel catalysts exhibited high catalytic activities (homopolymerization: up to 2.6×106 g (mol of Ni)−1 h−1; copolymerization: up to 1.0×105 g (mol of Ni)−1 h−1;) and good thermal stabilities at 80 °C, generating high‐molecular‐weight polyethylenes (Mn up to 8.45×104 g mol−1) as well as copolymers (Mn up to 2.19×104 g mol−1). The Ni center exhibited square planar geometry. The N atom between the imine and phosphine‐oxide moieties exhibited trigonal planar geometry, indicating electron‐donating conjugate effect of the sp2 hybrid N‐atom linker. This electronic effect can increase the electron density on the nickel center and result in enhanced catalytic performance.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
