264259-04-3Relevant academic research and scientific papers
Reaction of 2,8-bis(o -hydroxyaryl)quinolines with group 4 metal alkyls resulting in three distinct coordination modes of the tridentate ligand. X-ray structure of complexes and performance as precursors in ethylene polymerization catalysis
Nifant'ev, Ilya E.,Ivchenko, Pavel V.,Bagrov, Vladimir V.,Nagy, Sandor M.,Mihan, Shahram,Winslow, Linda N.,Churakov, Andrei V.
supporting information, p. 2685 - 2692 (2013/06/27)
A series of bis(o-hydroxyphenyl)quinolines have been prepared, starting from 2,8-dibromoquinoline. Reaction of these new ligand precursors with group 4 tetrabenzyl complexes MBn4 results in benzyl substitution of the azine fragment with the formation of amide complexes (M = Ti) or amine complexes with an N-H fragment coordinated to the metal (M = Zr, Hf). The third structural type - Zr complexes where the aromatic system of the precursor remains intact - can be prepared through the reaction of the bis(o-hydroxyphenyl)quinolones with 4 mol of methyllithium, followed by ZrCl4. The new complexes result in active polymerization catalysts when activated with MAO/borate cocatalysts on silica supports, resulting in polyethylene copolymers with very high molecular weights and multimodal MWDs.
Method for preparing non-metallocene catalysts
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Page/Page column 16, (2012/04/17)
A method of preparing supported catalysts useful for olefin polymerization is described. The catalysts comprise a Group 4 metal complex that incorporates a tridentate dianionic ligand. An activator mixture is first made from a boron compound having Lewis
Catalysts based on 2-(2-aryloxy)quinoline or 2-(2-aryloxy)dihydroquinoline ligands
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, (2012/04/23)
Catalysts useful for polymerizing olefins are disclosed. The catalysts comprise an activator and a Group 4 metal complex that incorporates a dianionic, tridentate 2-(2-aryloxy)quinoline or 2-(2-aryloxy)dihydroquinoline ligand. In one aspect, supported cat
One-electron oxidation of electronically diverse manganese(III) and nickel(II) salen complexes: Transition from localized to delocalized mixed-valence ligand radicals
Kurahashi, Takuya,Fujii, Hiroshi
supporting information; experimental part, p. 8307 - 8316 (2011/07/08)
Ligand radicals from salen complexes are unique mixed-valence compounds in which a phenoxyl radical is electronically linked to a remote phenolate via a neighboring redox-active metal ion, providing an opportunity to study electron transfer from a phenola
2-Phosphanylphenolate Nickel Catalysts for the Polymerization of Ethylene
Heinicke, Joachim,Koehler, Martin,Peulecke, Normen,He, Mengzhen,Kindermann, Markus K.,Keim, Wilhelm,Fink, Gerhard
, p. 6093 - 6107 (2007/10/03)
The previously unknown methallylnickel 2-diorganophosphanylphenolates (R=Ph, cHex) were synthesized and found to catalyze the polymerization of ethylene. To explore the potential for ligand-tuning, a variety of P-alkyl- and P-phenyl-2-phosphanylphenols wa
