Condensation of 2-benzoyl-6,7-dihydro-5H-quinolin-8-one with an excess of the respective fluorinated aniline in the presence of cobalt (II) chloride has provided an effective one-flask synthesis of the 2-(phenyl(arylimino)methyl)-8-arylimino-6,7-dihydro-5H-quinoline-cobalt (II) chloride complexes, [2-(ArN=CPh)-8-(NAr)-C₉H₉N]CoCl₂ (Ar = 2-Me-4,6-(CH(p-FC₆H₄)₂)₂C₆H₂ Co1, 2,6-Me₂-4-(CH(p-FC₆H₄)₂)C₆H₂ Co2, 2,4-Me₂-6-(CH(p-FC₆H₄)₂)C₆H₂ Co3, 2-Et-4,6-(CH(p-FC₆H₄)₂)₂C₆H₂ Co4, 2-i-Pr-4,6-(CH(p-FC₆H₄)₂)₂C₆H₂ Co5, 2-F-4,6-(CH(p-FC₆H₄)₂)₂C₆H₂ Co6). Structural characterization of Co2 and Co4 revealed the unsymmetrical nature of the N,N,N-chelating ligands and the five-coordinate geometries around the metal ions. Complexes Co1–Co6 all exhibited high activities as precatalysts for ethylene polymerization when treated with either MAO or MMAO producing highly linear (T_m′s > 118°C) low molecular weight polyethylene (M_w range: 0.69–31.51 kg mol⁻¹) with a variety of dispersities (M_w/M_n range: 2.2–17.5). 2,6-Dimethyl-containing Co2 was the most productive precatalyst of the series reaching an exceptionally high activity of 27.06 × 10⁶ g (PE) mol⁻¹ (Co) h⁻¹ at a temperature of 50°C. Additionally, ortho-fluoride Co6 maintained an impressive level of activity at an operating temperature of 70°C and was able to maintain a long catalytic lifetime. Furthermore, the presence of vinyl end groups (–CH=CH₂) in the ¹H/¹³C NMR and IR spectra of their polymers supports the key role played by β-H elimination in chain transfer.

中文翻译：

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氟化双（芳基亚氨基）-6,7-二氢-5H-喹啉-钴聚合催化剂：乙烯基封端线性聚乙烯蜡形成中的电子调节与空间调节

在氯化钴 (II) 存在下，2-苯甲酰基-6,7-二氢-5 H -quinolin-8-one 与相应的氟化苯胺的缩合反应提供了一种有效的单烧瓶合成 2-(苯基(芳基亚氨基)甲基)-8-芳基亚氨基-6,7-二氢-5 H-喹啉-钴(II)氯化物配合物，[2-(ArN=CPh)-8-(NAr)-C ₉ H ₉ N] CoCl ₂ (Ar = 2-Me-​​4,6-(CH( p -FC ₆ H ₄ ) ₂ ) ₂ C ₆ H ₂ Co1 , 2,6-Me ₂ -4-(CH( p -FC ₆ H ₄ ) ₂)C ₆ H ₂ Co2 , 2,4-Me ₂ -6-(CH( p -FC ₆ H ₄ ) ₂ )C ₆ H ₂ Co3 , 2-Et-4,6-(CH( p -FC ₆ H ₄ ) ₂ ) ₂ C ₆ H ₂ Co4 , 2 - i- Pr-4,6-(CH( p -FC ₆ H ₄ ) ₂ ) ₂ C ₆ H ₂ Co5 , 2-F-4,6-(CH ( p -FC ₆H ₄ ) ₂ ) ₂ C ₆ H ₂ Co6 )。Co2和Co4的结构表征揭示了N、N、N螯合配体的不对称性质和金属离子周围的五配位几何形状。当用 MAO 或 MMAO 处理产生高线性 ( T _m ′s > 118°C) 低分子量聚乙烯 ( M _w范围: 0.69–31.51 kg mol ^-1) 具有多种分散度（M _w / M _n范围：2.2–17.5）。含 2,6-二甲基的Co2是该系列中产率最高的预催化剂，在50°C 的温度下达到 27.06 × 10 ⁶  g (PE) mol ^-1 (Co) h ^-1的极高活性。此外，邻氟化物 Co6在70°C 的操作温度下保持了令人印象深刻的活性水平，并且能够保持较长的催化寿命。^{此外，在1} H/ ¹³中存在乙烯基端基 (–CH=CH ₂ )其聚合物的 C NMR 和 IR 光谱支持β -H 消除在链转移中所起的关键作用。