2-(1-(Arylimino)ethyl)-8-arylimino-5,6,7-trihydroquinolylcobalt dichloride: Synthesis and polyethylene wax formation

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• 作者：Wen-Hua Sun^a ; ^{whsun@iccas.ac.cn} ; Shaoliang Kong^a ; ^b ; Wenbin Chai^c ; Takeshi Shiono^d ; Carl Redshaw^e ; ¹ ; Xinquan Hu^c ; Cunyue Guo^b ; Xiang Hao^a
• 关键词：2 ; 8-Bis(imino)5 ; 6 ; 7-trihydroquinolylcobalt dichloride ; Cobalt pre-catalyst ; Thermal-stable pre-catalyst ; Single-site active species ; Polyethylene wax
• 刊名：Applied Catalysis A: General
• 出版年：2012
• 出版时间：7 December, 2012
• 年：2012
• 卷：447-448
• 期：Complete
• 页码：67-73
• 全文大小：563 K

文摘

A series of 2-(1-(arylimino)ethyl)-8-arylimino-5,6,7-trihydroquinolylcobalt dichloride (aryl = 2,6-R¹-4-R²C₆H₂) pre-catalysts were synthesized and structurally characterized by FT-IR and elemental analyses. The molecular structures of Co1 (R¹ = Me, R² = H), Co2 (R¹ = Et, R² = H) and Co5 (R¹ = Et, R² = Me) were determined by single-crystal X-ray diffraction analysis, and confirmed Co1 as a distorted trigonal bipyramidal geometry at the metal, whilst in Co2 and Co5 the metal is square-pyramidal. Upon treatment with either MAO or MMAO, all cobalt pre-catalysts exhibited highest activities at 60 ¡ãC for ethylene polymerization. The resultant polyethylenes, under optimization reaction parameters, possessed low molecular weight (waxes) and narrow polydispersity.