Synthesis, Characterization, and Ethylene Oligomerization Action of [(C₆H₅)₂PC₆H₄C(O-B(C₆F₅)₃)O-κ²P,O]Ni(η³-CH₂C₆H₅)

Synthesis of Branched Polyethylene by Tandem Catalysis

“…Table 3 shows that for equal loadings, the uptake of ethylene is greater for 11 than 10 during the first hour of reaction (entries 2 vs 5 and 3 vs 6). [44] Note that the chain length distribution remains invariant of monomer pressure and precatalyst structure, consistent with both 10/C 2 H 4 and 11/C 2 H 4 giving rise to the same catalytic species.…”

Synthesis and characterization of N-(2-pyridyl)benzamide-based nickel complexes and their activity for ethylene oligomerization

“…These nickel complexes contain an anionic [P, O] chelate ring and show high activity and selectivity for the conversion of ethylene to linear a-olefins and polymers. Neutral nickel(II) catalysts containing anionic [N, O] chelate ring were also largely reported in recent years [19][20][21][22][23][24]. One such type of catalyst is the neutral salicylaldimine nickel complex, reported by GrubbsÕ group, having the highest activity of 1.3 Â 10 5 mol ethylene (mol Ni h) À1 for ethylene polymerization [21].…”

Oligomerization of Ethylene Catalyzed by Iron and Cobalt in Organoaluminate Dialkylimidazolium Ionic Liquids

“…The advances achieved in this field allow access to catalysts that permit selective dimerization [1][2][3], trimerization [4], tetramerization [5], and even specific oligomerization [6] of ethylene.…”