Systematic Investigations of Ligand Steric Effects on α-Diimine Nickel Catalyzed Olefin Polymerization and Copolymerization

Suppression of chain transfer via a restricted rotation effect of dibenzosuberyl substituents in polymerization catalysis

Catalysts with dibenzosuberyl substituents possess superior thermostability and outstanding ability to suppress chain transfer in ethylene (co)polymerization, producing high molecular weight polyethylene and functionalized polyethylene.

Influence of intramolecular π–π and H-bonding interactions on pyrazolylimine nickel-catalyzed ethylene polymerization and co-polymerization

Pyrazolylimine-based nickel catalysts bearing intramolecular π–π and H-bonding interactions show high activity, thermal stability, and Mn of polyethylene.

Tunable branching and living character in ethylene polymerization using “polyethylene glycol sandwich” α-diimine nickel catalysts

The key effects of polyethylene glycol units as a unique secondary coordination sphere in α-diimine Ni(ii)-mediated ethylene polymerization are comprehensively disclosed.

The synergistic effect of rigid and flexible substituents on insertion polymerization with α-diimine nickel and palladium catalysts

The introduction of flexible cycloalkyl groups greatly enhanced the chain growth in the Ni(ii) catalytic system and facilitated the insertion of polar monomers in the Pd(ii) catalytic system.

Influence of initiating groups on phosphino-phenolate nickel catalyzed ethylene (co)polymerization

The influence of initiating groups on late transition metal catalyzed ethylene (co)polymerization was comprehensively studied for the first time.

Flexible cycloalkyl substituents in insertion polymerization with α-diimine nickel and palladium species

The investigation of the relationship between the structure of the catalyst and the microstructure of the obtained polymer has attracted much attention and broad interest in the field of transition metal-catalyzed olefin polymerization.

α-Diimine nickel complexes bearing axially bulky terphenyl and equatorially bulky dibenzobarrelene groups: synthesis, characterization and olefin polymerization studies

A new family of asymmetric α-diimine nickel complexes bearing axially and equatorially bulky groups were synthesized successfully. They exhibited high catalytic activities for ethylene polymerization and afforded ultra-high-molecular-weight elastomeric polyethylenes.

Comprehensive studies of the ligand electronic effect on unsymmetrical α-diimine nickel(ii) promoted ethylene (co)polymerizations

The ligand electronic effects on the horizontal axis and vertical axis are systematically disclosed in unsymmetrical α-diimine Ni(ii)-promoted ethylene polymerization and copolymerization reactions.

A remote nonconjugated electron effect in insertion polymerization with α-diimine nickel and palladium species

The remote nonconjugated electronic perturbations exert great influence on ethylene polymerization.

Bulky yet flexible substituents in insertion polymerization with α-diimine nickel and palladium systems

The bulky yet flexible substituent on the N-aryl moieties of α-diimine ligands may adopt different conformations and provide dynamic steric hindrance in the process of ethylene (co)polymerization.