(η(5)-1-ethylindenyl)trichlorotitanium | 179118-28-6

• 英文名称: (η(5)-1-ethylindenyl)trichlorotitanium
• 英文别名: 1-ethylindenyltrichlorotitanium
• CAS: 179118-28-6
• 化学式: C₁₁H₁₁Cl₃Ti
• 分子量: 297.447
• InChiKey: NTFRQUPWPIJGGV-UHFFFAOYSA-K

计算性质

• 辛醇/水分配系数(LogP)：
  None
• 重原子数：
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• 可旋转键数：
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• 环数：
  None
• sp3杂化的碳原子比例：
  None
• 拓扑面积：
  None
• 氢给体数：
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• 氢受体数：
  None

反应信息

• 作为产物：
  描述：

  (1-trimethylsilyl)-3-ethylindene 、 四氯化钛 以 二氯甲烷 为溶剂， 以96%的产率得到(η(5)-1-ethylindenyl)trichlorotitanium
  参考文献：
  名称：

  Alkyl-substituted indenyl titanium precursors for syndiospecific ziegler-natta polymerization of styrene

  摘要：

  A variety of 1- and 3-substituted alkylindenes (R = H, Me, Et, tert-butyl, Me(3)Si) as well as 2-methylindene and 3-(methylthio)indene have been prepared in good yields. The substituted indenes were converted into trimethylsilyl derivatives via reactions of intermediate organolithium complexes with chlorotrimethylsilane. The corresponding titanium complexes, (R-Ind)TiCl3, were synthesized in excellent yield from reactions of the trimethylsilyl derivatives with TiCl4. The titanium complexes were evaluated as styrene polymerization catalysts in toluene solution when activated by methylaluminoxane. Activities increased in the order: Cp < H(4)Ind < Ind < 1-(Me)Ind < 2-(Me)Ind. A steep drop in activity was observed when R = Et, tert-butyl, and Me(3)Si, corresponding to an increase in the steric bulk of the substituent in the catalyst precursor. 1-(MeS)IndTiCl(3) was found to be ineffective as a styrene polymerization catalyst. Syndiospecificities of the titanium complexes were generally very good (65-98%).

  DOI：

  10.1016/s0022-328x(96)06153-0

文献信息

• Synthesis and polymerization behavior of various substituted indenyl titanium complexes as catalysts for syndiotactic polystyrene
  作者：Youngjo Kim、Bo Hwan Koo、Youngkyu Do

  DOI：10.1016/s0022-328x(96)06607-7

  日期：1997.1

  Five substituted indenyltrichlorotitanium compounds have been synthesized and characterized by spectroscopic methods and their catalytic behavior for the polymerization of styrene was studied in the presence of methylaluminoxane (MAO) as a cocatalyst. Substituted indenyl ligands include 1,3-dimethyl, 1-methyl, 1-ethyl, 1-isopropyl and 1-(trimethylsilyl)indenyl groups. All five compounds gave extremely pure syndiotactic polystyrene, with conversion rates of at least 95%, and their catalytic properties were compared with the data obtained from the (eta(5)-indenyl)trichlorotitanium-MAO system. The catalytic activity is enhanced by less bulky and better electron-releasing substituents of the indenyl ligand.