[((2,6-diisopropylphenylimino)methyl)pyrazine nickel methyl diethyletherate] (tetrakis[3,5-bis(trifluoromethyl)phenyl]borate) | 548456-87-7

• 分子结构分类: 有机化合物
• 英文名称: [((2,6-diisopropylphenylimino)methyl)pyrazine nickel methyl diethyletherate] (tetrakis[3,5-bis(trifluoromethyl)phenyl]borate)
• CAS: 548456-87-7
• 化学式: C₂₂H₃₄N₃NiO*C₃₂H₁₂BF₂₄
• 分子量: 1278.44
• InChiKey: NPBVKXCRPISEBE-WFSBHXJESA-N

计算性质

• 辛醇/水分配系数(LogP)：
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• 重原子数：
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• 可旋转键数：
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• 环数：
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• sp3杂化的碳原子比例：
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• 拓扑面积：
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• 氢给体数：
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• 氢受体数：
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反应信息

• 作为产物：
  描述：

  tetrakis[3,5-bis(trifluoromethyl)phenyl]boric acid bis(diethyl ether) complex 、 ((2,6-diisopropylphenylimino)methyl)pyrazine nickel dimethyl 以 乙醚 为溶剂， 以90%的产率得到[((2,6-diisopropylphenylimino)methyl)pyrazine nickel methyl diethyletherate] (tetrakis[3,5-bis(trifluoromethyl)phenyl]borate)
  参考文献：
  名称：

  The role of bulky substituents in the polymerization of ethylene using late transition metal catalysts: a comparative study of nickel and iron catalyst systems

  摘要：

  A series of nickel(II) and iron(II) complexes of the general formula [LMX2] containing bidentate (for M = Ni) and tridentate (for M = Fe) heterocycle-imine ligands L have been synthesized and characterized. Compared to the well-known alpha-diimine nickel and bis(imino)pyridine iron catalysts, these systems contain a bulky imine substituent on one side and a non-bulky N-heterocycle on the other. Depending on the ligand and the conditions used, either four- or five-coordinate complexes are obtained in the case of nickel. Iron complexes are generally five-coordinate, even with potentially tetradentate ligands. Activation of these precatalysts with MAO affords active catalyst systems for the oligomerization/polymerization of ethylene. Compared to alpha-diimine nickel and bis(imino)pyridine iron catalysts, both- metal systems provide only half of the steric protection and consequently the catalytic activities and the degree of polymerization are significantly lower. Lower activities are attributed to a reduced stability of the active species under polymerization conditions, whereas the lower molecular weights are a result of increased beta-H transfer rates. Variations within the heterocyclic component of the ligand reveal that both steric and electronic factors influence the polymerization behavior of these catalysts. (C) 2002 Elsevier Science B.V. All rights reserved.

  DOI：

  10.1016/s0020-1693(02)01293-8