Recent progress on nickel-based systems for ethylene oligo-/polymerization catalysis

Abstract

Recent progress on nickel-based complex pre-catalysts is reviewed herein.The ethylene oligo-/polymerization behaviour is disscussed in terms of the variation of the complex models bearing different kinds of ligand sets. These discussions focus mainly on the influence that the different substituents present have on the observed catalytic activity, the results of which can guide the design of new target structures possessing high ethylene activity.

Recent advances in Ni-mediated ethylene chain growth: Nimine-donor ligand effects on catalytic activity, thermal stability and oligo-/polymer structure

“…However, despite recent key developments, only few reviews have been dedicated to the subject of nickel-based homogeneous technology [24][25][26].…”

Simple Preparation of Halogen-Substituted <i>α</i>-Diimine Nickel Complexes Immobilized into Clay Interlayer as Catalysts for Ethylene Oligo-/Polymerization

“…Since Brookhart and coworkers found that the high electrophilicity of the cationic species of the α-diimine Ni(II) and Pd(II) complexes afforded a high activity for the polymerization of α-olefins, late transition-metal technology has attracted great attention in both academic and industrial research [1]- [8].…”

The novel [Ni{(Ph2P)2N(CH2)3Si(OCH3)3-P,P´}I2] complex: Structural features and catalytic reactivity in the oligomerization of ethylene

“…By inspecting the structure of complex 1, the intermolecular interactions of the C−H ••• p type are 3 and Ph groups of neighboring molecules. A structural disorder involving two of the three -OCH 3 groups is observed in complex 1, and it has also been observed for complex 2 [17].…”

“…Ethylene oligomerization affords a variety of up to C 10 olefins, with 1-olefins being the most desirable ones [2]. A variety of metal complexes bearing various ligands have been extensively studied as catalysts for the oligomerization of ethylene, with chromium [2] and nickel [3] complexes being among the most common ones. Among various types of ligands employed for the synthesis of such catalysts, bis(phosphino)amines, (R 2 P) 2 N(R′), in the following referred to as (P,P), have been shown to afford a host of coordination compounds [4], the catalytic reactivity of which is under extensive investigation [5].…”