0000000000624484
AUTHOR
Qiuyue Zhang
Enhancing performance of α‐diiminonickel precatalyst for ethylene polymerization by substitution with the 2,4‐bis(4,4'‐dimethoxybenzhydryl)‐6‐methylphenyl group
High activities in ethylene polymerization predetermine α‐diiminonickel precatalysts for potential industrial applications. In our study, we have synthesized and characterized a series of unsymmetrical 1‐(2,4‐bis(4,4′‐dimethoxybenzhydryl)‐6‐MeC6H2N)‐2‐arylimino‐acenaphthylene nickel(II) halides. The single‐crystal X‐ray diffraction study of representative compounds reveals distorted tetrahedral geometry. On activation with either Me2AlCl or modified methylaluminoxane, these nickel complexes exhibit high activities of the order of 106 g of PE (mol of Ni)−1 h−1 and produce polyethylene of generic application characterized by high molecular weight, narrow molecular weight distribution, and mod…
The chloro‐substituent enhances performance of 2,4‐bis (imino)pyridylchromium catalysts yielding highly linear polyethylene
The five unsymmetrical 2‐[1‐(2,4‐dibenzhydryl‐6‐chlorophenylimino)ethyl]‐6‐[1‐(arylimino)ethyl]pyridine compounds (aryl: 2,6‐Me2Ph L1 , 2,6‐Et2Ph L2 , 2,6‐i Pr2Ph L3 , 2,4,6‐Me3Ph L4 and 2,6‐Et2–4‐MePh L5 ) were prepared and characterized with FT‐IR and 1H/13C NMR spectroscopy as well as elemental analysis. The treatment of L1 – L5 with CrCl3·3THF affords the corresponding chromium chloride complexes (Cr1 – Cr5 ) in excellent yields. The molecular structures of Cr2 and Cr3 characterized by X‐ray diffraction show a distorted octahedral geometry with three nitrogen atoms and three chlorine atoms around the metal center. On activation with either MAO or MMAO, Cr1 – Cr5 collectively display hig…
CCDC 1979970: Experimental Crystal Structure Determination
Related Article: Shi‐Fang Yuan, Zhe Fan, Qiuyue Zhang, Zygmunt Flisak, Yanping Ma, Yang Sun, Wen‐Hua Sun|2020|Appl.Organomet.Chem.|34 |e5638|doi:10.1002/aoc.5638
CCDC 1979969: Experimental Crystal Structure Determination
Related Article: Shi‐Fang Yuan, Zhe Fan, Qiuyue Zhang, Zygmunt Flisak, Yanping Ma, Yang Sun, Wen‐Hua Sun|2020|Appl.Organomet.Chem.|34 |e5638|doi:10.1002/aoc.5638
CCDC 1951481: Experimental Crystal Structure Determination
Related Article: Badral Gansukh, Qiuyue Zhang, Zygmunt Flisak, Tongling Liang, Yanping Ma, Wen‐Hua Sun|2020|Appl.Organomet.Chem.|34|e5471|doi:10.1002/aoc.5471
CCDC 1951482: Experimental Crystal Structure Determination
Related Article: Badral Gansukh, Qiuyue Zhang, Zygmunt Flisak, Tongling Liang, Yanping Ma, Wen‐Hua Sun|2020|Appl.Organomet.Chem.|34|e5471|doi:10.1002/aoc.5471