2-Oxazoline/benzoxazole-1,10-phenanthrolinylmetal (iron, cobalt or nickel) dichloride: Synthesis, characterization and their catalytic reactivity for the ethylene oligomerization

Pyridine–oxazoline and quinoline–oxazoline ligated cobalt complexes: Synthesis, characterization, and 1,3-butadiene polymerization behaviors

“…In recent years, research interest has been focused on the design and synthesis of well-defined single-site catalysts in order to gain precise control of the catalysis behavior and polymer composition [12][13][14][15]. Since the discovery of bis(arylimino)pyridine ligated Co(II) and iron(II) complexes as effective catalysts for ethylene polymerization/oligomerization [16,17], a variety of transition metal complexes bearing α-diimine, pyridinediimine, and their derivatives have been synthesized and exploited as catalyst precursors for olefin polymerization [18][19][20][21][22][23][24].…”

2‐Benzoxazolyl‐6‐[1‐(arylimino)ethyl]pyridyliron(II) Chlorides as Ethylene Oligomerization Catalysts

“…[12] We recently reported several alternative iron complexes as catalysts for ethylene oligomerization and polymerization. [13] Iron complexes bearing 2-ester-6-iminopyridines showed moderate activities, [14] whereas complexes ligated by 2-imino-1,10-phenanthrolines (Figure 1, A), [15] 2-benzimidazolyl-6-iminopyridines (B), [16] 2-benzimidazolyl-1,10-phenanthroline (C), [17] 2-quinoxalinyl-6-iminopyridines (D), [18] N-[(pyridin-2-yl)methylene]quinolin-8-amines (E), [19] and 2-oxazoline/benzoxazole-1,10-phenanthrolines [20] (F) as pyramid. Upon activation with modified methylaluminoxane, all iron complexes showed moderate to good activities [up to ca.…”

Cobalt(II)‐based ethylene dimerization catalysts with silicon‐bridged diphosphine ligands

“…Relative to nickel catalysts, cobalt complexes function with low rates of isomerization and, consequently, high product selectivity . Therefore, many cobalt complexes have been explored for use in ethylene oligomerization during the last decade …”