High molecular weight polyethylene <i>via</i> the spatial proximity of benzosuberyl in iminopyridine nickel catalysts.

ABSTRACT: Iminopyridine nickel catalysts are typically prone to facile chain transfer reactions, resulting in low molecular weight polyethylenes. In this study, a spatial proximity strategy was employed in 5-dibenzosuberyl-modified iminopyridine nickel catalysts to enhance ethylene polymerization. Using a template reaction between acetylpyridine and 5-dibenzosuberyl-functionalized aniline, a series of 2-(1-(2,6-bis(5-dibenzosuberyl)-4-(alkyl)phenylimino)ethyl)pyridine ligands were synthesized and subsequently reacted with (1,2-dimethoxyethane)NiBr₂ to afford the corresponding nickel complexes. Single-crystal X-ray diffraction revealed a sandwich-like arrangement in the resulting nickel complexes, with short centroid-to-plane distances (average: 3.194 Å for Ni1^Me and 3.268 Å for

SUBMITTER: Khalid A 

PROVIDER: S-EPMC12405996 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature