Abstract
A series of phosphinobenzenamine palladium complexes Pd1–Pd5 with different substituents was successfully synthesized and characterized. X-ray diffraction analysis of Pd1, Pd2, and Pd4 revealed that the palladium complexes exhibited an almost square–planar geometry and structural distinctions compared with previously reported N∧P-based palladium complexes. These palladium complexes exhibited high activity (4.92 × 105 g mol–1 h–1) toward ethylene polymerization with excellent thermal stability up to 100 °C to produce semicrystalline polyethylenes bearing unsaturated vinylene/vinyl groups with moderate branch densities (15–26/1000 C). Most importantly, they could promote the copolymerization of ethylene and polar monomers, such as methyl acrylate (MA) and 5-hexene-1-yl-acetate (HAc), even at a high temperature of 80 °C.
Original language | English |
---|---|
Journal | Organometallics |
DOIs | |
State | Published - 18 Nov 2022 |
Keywords
- Catalysts
- Ethylene polymerization
- Hydrocarbons
- Palladium
- Palladium complexes