hexa(tert-butyl)ytterbocene | 317386-16-6

• 英文名称: hexa(tert-butyl)ytterbocene
• 英文别名: [1,2,4-(Me3C)3C5H2]2Yb
• CAS: 317386-16-6
• 化学式: C₃₄H₅₈Yb
• 分子量: 639.875
• InChiKey: AWZABTGCXNUGKW-UHFFFAOYSA-N

计算性质

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

反应信息

• 作为反应物：
  描述：

  氯代叔丁烷 、 hexa(tert-butyl)ytterbocene 以 甲苯 为溶剂， 反应 16.0h， 以73%的产率得到[(η5-1,2,4-(Me3C)3C5H2)2YbCl]
  参考文献：
  名称：

  重镧系金属茂阳离子的合成及电子结构

  摘要：

  在dysprosocenium 复合物[Dy(Cpttt)2][B(C6F5)4] (Cpttt = C5H2tBu3-1,2,4, 1-Dy) 中 60 K 磁滞的起源仍然是个谜，因此我们设想分析一个[Ln(Cpttt)2]+ (Ln = 镧系元素) 阳离子系列可以阐明这些特性。在此，我们报告了一系列分离的 [Ln(Cpttt)2]+ 阳离子（1-Ln；Ln = Gd、Ho、Er、Tm、Yb、Lu）的合成和物理表征，通过 [Ln( Cpttt)2(Cl)]（2-Ln；Ln = Gd、Ho、Er、Tm、Yb、Lu）。1-Ln 和 2-Ln 两个家族中的配合物是同构的，分别显示伪线性和伪三角晶体场。这导致原型电子结构，由 CASSCF-SO 计算确定，并用 SQUID 磁力计和 EPR 光谱证实，根据 Ln 离子的选择，显示易轴或易平面磁各向异性。对其磁弛豫动力学的研究表明，1-Ho 还表现出与

  DOI：

  10.1021/jacs.7b11535
• 作为产物：
  描述：

  ytterbium(II) iodide 、 sodium tri(tert-butyl)cyclopentadienide 以 四氢呋喃 为溶剂， 以76%的产率得到hexa(tert-butyl)ytterbocene
  参考文献：
  名称：

  Synthesis and Solid State Structures of Sterically Crowded d⁰-Metallocenes of Magnesium, Calcium, Strontium, Barium, Samarium, and Ytterbium

  摘要：

  The base-free metallocenes [1,2,4-(Me3C)(3)C5H2](2)Ca, [1,2,4-(Me3C)(3)C5H2](2)Sr, and [1,2,4-(Me3C)(3)C5H2](2)Ba have been prepared by reaction of MI2 and the sodium or potassium salt of the substituted cyclopentadiene an ion in THF, while [1,2,4-(Me3C)(3)C5H2](2)Mg was prepared from the cyclopentadiene, 1,2,4-(Me3C)(3)C5H3, and dibutylmagnesium. The structures of the magnescene and calcocene as well as those of the previously prepared ytterbium and analgoues havebeen. determined by X-ray crystallography. The metallocenes are slightly bent in the solid state with centroid-metal-centroid angles ranging from 163degrees to 173degrees. Adducts of the strontocene and samarocene with THF and of the barocene, samarocene, and ytterbocene with 2,6-Me2C6H3NC have also been prepared and characterized. The massive bulk of the [1,2,4-(Me3C)(3)C5H2](-) ligand leads to behavior quite different from that previously observed for base-free metallocenes of the alkaline earths and divalent lanthanides.

  DOI：

  10.1021/om0108705

文献信息

• Weak paramagnetism in compounds of the type Cp′2Yb(bipy)
  作者：Marc D. Walter、Madeleine Schultz、Richard A. Andersen

  DOI：10.1039/b512865j

  日期：——

  magnetic moments are small, as is the case for the organometallic compounds described here. The use of quartz tubes to contain the compounds has been developed and applied to substituted ytterbocene bipyridine complexes, some of which were previously reported as diamagnetic. The SQUID measurements quantify the extent of paramagnetism and they correlate with the qualitative variable temperature 1H NMR

  测量对空气和湿气敏感的固体的磁矩非常困难，尤其是当净磁矩较小时，尤其是当 有机金属化合物在这里描述。指某东西的用途石英已经开发了包含该化合物的试管，并将其应用于取代的萜联吡啶配合物，其中一些据报道是抗磁性的。SQUID测量结果量化了顺磁性的程度，并且与定性可变温度相关1 H NMR谱。
• ——
  作者：Helmut Sitzmann、Thomas Dezember、Oliver Schmitt、Frank Weber、Gotthelf Wolmershäuser、Michael Ruck

  DOI：10.1002/1521-3749(200011)626:11<2241::aid-zaac2241>3.0.co;2-0

  日期：2000.11

  Octaisopropylmetallocenes of the lanthanoids Sm (1-Sm), Eu (1-Eu), and Yb (1-Yb) can be obtained easily from the diiodides of the rare earth elements. Like the hexa(tert.-butyl)metallocenes 2-Sm, 2-Eu, and 2-Yb, they show no tendency towards coordination of donor solvent molecules or alkali salts. The decaisopropylmetallocenes 3-Sm, 3-Eu und 3-Yb have been synthesized from the metal and the free pentaisopropylcyclopentadienyl radical. The three europocenes 1-Eu, 2-Eu, and 3-Eu show fluorescence in day-light or under UV irradiation (336 nm). Crystalline 1-Eu and 2-Eu are bent sandwich complexes, whereas for the decaisopropyl derivative 3-Eu axial symmetry with parallel five-membered rings has been observed.