Sm(1,3-bis(trimethylsilyl)propenyl)2(tetrahydrofuran)2 | 223907-93-5

• 英文名称: Sm(1,3-bis(trimethylsilyl)propenyl)2(tetrahydrofuran)2
• CAS: 223907-93-5
• 化学式: C₂₆H₅₈O₂Si₄Sm
• 分子量: 665.447
• InChiKey: IVOUNFQUHQVZCJ-FTHVFMQUSA-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：

  四氢呋喃 、 三氢化钐 、 2,2,6,6-四甲基-2,6-二硅杂-3-庚烯 在 KOt-Bu 、 BuLi 、 1,2-diiodoethane 作用下， 以 四氢呋喃 为溶剂， 以23%的产率得到Sm(1,3-bis(trimethylsilyl)propenyl)2(tetrahydrofuran)2
  参考文献：
  名称：

  Catalytic activity of allyl-, azaallyl- and diaza-pentadienyllanthanide complexes for polymerization of methyl methacrylate

  摘要：

  A variety of allylic, aza-allylic and 1,5-diazapentadienyllanthanide compounds were synthesized and their polymerization catalysis toward methyl methacrylate were examined. Divalent Sm[1,3-bis(trimethylsilyl)propenyl](2)(THF)(2) 1 and Sm(1,3-diphenylpropenyl)(2)(THF)(2) 2 were synthesized by the reaction of potassium 1,3-bis(trimethylsilyl)propenide or potassium 1,3-diphenyl-propenide with SmI2. The aza-allyllanthanide compound was synthesized by the reaction of 2-pyridylbenzyllithium with SmCl3 followed by the reaction with LiCH(SiMe3)(2) to give (2-pyridylbenzyl)(2)SmCH(SiMe3)(2) 3. 1,5-Diazapentadienyllanthanide was prepared by the reaction of K[(C5H4N)(2)CPh] with YbBr2 to give Yb[(C5H4N)(2)CPh](2)(THF)(2) 4, which crystalizes monoclinic, space group C2/C (No. 15), with a = 35.19(1), b = 13.613(3), c = 26.552(7) Angstrom, beta = 133.77(1)degrees and Z = 8. Preparations of divalent samarium and ytterbium complexes with bis(2-pyridylphenylmethyl)dimethylsilane ligand (6 and 7) were carried out by the reaction of dipotassium salt of bis(2-pyridylphenylmethyl)dimethylsilane with SmI2 or YbBr2. By using the resulting compounds 1, 2, 3, 4, 6 and 7 as initiator, we have examined their catalytic activities for the polymerization of methyl methacrylate and found that compounds 6 and 7 are effective to give high molecular weight isotactic polymers. (C) 1999 Elsevier Science S.A. All rights reserved.

  DOI：

  10.1016/s0022-328x(98)00977-2

文献信息

• The Role of Alkali Metal Cations in MMA Polymerization Initiated by Neutral and Anionic Allyl Lanthanide Complexes
  作者：Cheslan K. Simpson、Rosemary E. White、Christin N. Carlson、Debra A. Wrobleski、Christopher J. Kuehl、Teresa A. Croce、Ian M. Steele、Brian L. Scott、Victor G. Young,、Timothy P. Hanusa、Alfred P. Sattelberger、Kevin D. John

  DOI：10.1021/om050098w

  日期：2005.7.1

  corresponding neutral bis-(Yb, Eu) and tris-(Ce, Nd, Tb) allyl lanthanide complexes in yields ranging from 40 to 80%. These complexes, which have been crystallographically characterized, initiate the polymerization of methyl methacrylate (MMA), but with poor turnover frequencies when compared with the corresponding salt complexes of the type K[LnA‘3]. K[A‘] itself initiates MMA polymerization, however, and

  2或3当量的1,3-双（三甲基硅烷基）烯丙基钾（K [1,3-（SiMe 3）2 C 3 H 3 ] = K [A']）与Ce，Nd的三氟甲磺酸盐反应Eu，Tb和Yb给出相应的中性双-（Yb，Eu）和三-（Ce，Nd，Tb）烯丙基镧系元素络合物，产率为40％至80％。这些配合物，其已经被晶体学表征，发起甲基丙烯酸甲酯（MMA）的聚合，但具有差的转换频率时与该类型K [LNA”的相应的盐配合物相比，3 ]。K [A']本身会引发MMA聚合，但是它在盐配合物中作为离子对存在可能有助于杂金属镧系元素催化剂的活性。