η5-cyclopentadienyl titanium monomethoxydiflioride | 706820-43-1

• 英文名称: η5-cyclopentadienyl titanium monomethoxydiflioride
• CAS: 706820-43-1
• 化学式: C₆H₈F₂OTi
• 分子量: 182.006
• InChiKey: VNGPKFVBWGNWPY-UHFFFAOYSA-L

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：

  trimethoxy(η5-2,4-cyclopentadien-1-yl)titanium 、 trifluoroborane diethyl ether 以 乙醚 为溶剂， 以76%的产率得到η5-cyclopentadienyl titanium monomethoxydiflioride
  参考文献：
  名称：

  以BF 3  ·OEt 2为氟化剂的新型取代环戊二烯基钛单甲氧基二氟化合物的合成及其在苯乙烯间规聚合中的应用

  摘要：

  制备了五种取代的环戊二烯基三甲氧基钛络合物RCpTi（OMe）3（R = Me（2b），i Pr（2c），Me 3 Si（2d），烯丙基（2e），PhCH 2（2f））。通过使RCpTi（OMe）3与BF 3 OMe 2反应，六个RCpTiF 2（OMe）（R = H（3a），Me（3b），i Pr（3c），Me 3 Si（3d），烯丙基（3e）， PhCH 2（3楼））。当用甲基铝氧烷（MAO）活化时，苯乙烯溶液聚合中RCpTiF 2（OMe）体系的活性低于RCpTi（OMe）3体系，但RCpTiF 2（OMe）制备的聚合物具有更高的Mw和熔点比RCpTi（OMe）3高。两种体系均产生具有相似间同规整度的聚合物，其间规度为92.4-97.6％。在Cp-配体中引入取代基可提高聚合物的熔点，同时降低RCpTi（OMe）3 / MAO和RCpTiF 2（OMe）/ MAO系统的催化活性，其中活性顺序为RCp

  DOI：

  10.1016/j.jorganchem.2004.01.031

文献信息

• Syndiospecific polymerization of styrene catalyzed in situ by alkoxyl substituted half-sandwich titanocene and BF3·Et2O
  作者：Yanlong Qian、Hao Zhang、Xianmiao Qian、Jiling Huang、Chen Shen

  DOI：10.1016/s1381-1169(02)00412-0

  日期：2003.2

  A series of alkoxyl substituted half-sandwich titanocenes [CpTiCl2(OR), CpTi(OR)(3) and IndTiCl(2)(OR)] were treated with BF3.Et2O, which were employed in situ as catalyst precursors for the syndiospecific polymerization of styrene. When activated with methylaluminoxane (MAO), the catalyst precursors obtained in situ from the reaction of methoxyl substituted complexes [CpTiCl2(OMe), CpTi(OMe)(3)] and BF3.Et2O exhibited increased activities by factors of 2-4 compared with the corresponding original complexes, and provide improved syndiotacticity and higher activity up to a temperature of 70 degreesC. The catalyst precursor may consist of [CpTiClF2 and/or CpTiCl2F] and [CpTiF2(OMe).BF3 and/or CpTiF(OMe)(2).2BF(3)], through conversion from BF3-coordinated intermediates to fluorinated complexes, respectively, which has properties in polymerization similar to that of CpTiF3. But in the case of IndTiCl(2)(OR) and alkoxyl substituted half-sandwich titanocene with bulky OR groups, the activity considerably decrease probably due to the bulky group retarding the conversion from BF3-coordinated intermediates to fluorinated complexes, which can stabilize catalytic precursor and inhibit reduction from Ti(IV) to Ti(III). (C) 2002 Elsevier Science B.V. All rights reserved.