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RESEARCH PRODUCT
2-Chloro/phenyl-7-arylimino-6,6-dimethylcyclopenta[b]pyridylnickel chlorides: Synthesis, characterization and ethylene oligomerization
Xiang HaoZhifeng MaWenhong YangHongyi SuoWen-hua SunYoufu ZhangYoufu ZhangXinquan HuZygmunt FlisakZygmunt Flisaksubject
chemistry.chemical_classificationEthylene010405 organic chemistryethylene oligomerizationProcess Chemistry and TechnologyMethylaluminoxaneGeneral ChemistryPolyethylene010402 general chemistry01 natural sciencesOligomerMedicinal chemistryCatalysis0104 chemical sciencesCatalysisBond lengthnickel precatalystchemistry.chemical_compoundchemistrysubstituent influenceEthylaluminium sesquichlorideOrganic chemistry7-Aryliminocyclopenta[b]pyridineAlkyldescription
Abstract 2-Chloro/phenyl-7-arylimino-6,6-dimethylcyclopenta[b]pyridylnickel chlorides (Ni1–Ni8) were synthesized from the respective ligands L1–L8 and characterized. Upon activation with either methylaluminoxane (MAO) or ethylaluminium sesquichloride (EASC), they show high catalytic activity of up to 10.84 × 106 g(oligomer) mol− 1(Ni) h− 1 in ethylene oligomerization. The products range from butenes to dodecenes for Ni1–Ni4, but are limited to butenes and hexenes in the case of Ni5–Ni8. DFT calculations indicate that the Ni C bond length in the model alkyl complexes depends both on the nature of the substituents at the heterocycles and the kind of the alkyl group, shedding some light on the preferences of the precatalysts toward oligomers or polyethylene.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-12-01 | Catalysis Communications |