(η(5)-C5H5)3USi(trimethylsilyl)3 | 163394-08-9

• 英文名称: (η(5)-C5H5)3USi(trimethylsilyl)3
• CAS: 163394-08-9
• 化学式: C₂₄H₄₂Si₄U
• 分子量: 680.968
• InChiKey: YREJJVHYCJTNIP-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

• 作为产物：
  描述：

  tris(cyclopentadienyl)chlorouranium(IV) 、 tris(trimethylsilyl)silyllithium*3(tetrahydrofuran) 以 乙醚 为溶剂， 以73%的产率得到(η(5)-C5H5)3USi(trimethylsilyl)3
  参考文献：
  名称：

  Metal-silicon bonding energetics in organo-Group 4 and organo—f-element complexes. Implications for bonding and reactivity

  摘要：

  Metal-silicon bond disruption enthalpies have been measured for a series of U, Zr, and Sm metallocene complexes: Cp(3)USi(TMS)(3), Cp(2)Zr(Cl)Si(TMS)(3), Cp(2)Zr(Me)Si(TMS)(3), Cp(2)Zr(TMS)Si(TMS)(3), Cp(2)Zr(TMS)O-(t)Bu, Cp'2SmSiH(TMS)(2) (Cp=eta(5)-C5H5, Cp' = eta(5)-Me(5)C(5), TMS = trimethylsilyl). Data were obtained by anaerobic batch-titration solution calorimetry in toluene. Derived metal-ligand bond enthalpies D(L(n)M-R) in kcal mol(-1) are: D[Cp(3)U-Si(TMS)(3)] = 37(3), D[Cp(2)(Cl)Zr-Si(TMS)(3)] = 57(3), D[Cp(2)(Me)Zr-Si(TMS)(3)] = 56(5), D[Cp(2)(Si(TMS)(3))Zr-Me] = 66(5), D[Cp(2)(O-(t)Bu)Zr-TMS] = 60(5), D[Cp(2)(TMS)Zr-Si(TMS)(3)] = 42(11), D[Cp(2)(Si(TMS)(3))Zr-TMS] = 45(7), D[Cp'Sm-2-SiH(TMS)(2)] = 43(5). These results show that metal-silicon bond disruption enthalpies involving these electron-deficient metals are substantially smaller than those of the corresponding metal hydride and hydrocarbyl bends. These data in combination with previously measured metal-ligand bond enthalpies allow thermodynamic analyses of a variety of stoichiometric and catalytic transformations involving metal silyl functionalities. The latter include potential pathways for dehydrogenative silane polymerization, dehydrogenative silane-hydrocarbon coupling, olefin hydrosilylation, and dehydrogenative silane-amine coupling. It is not uncommon for there to be multiple pathways which effect the same catalytic transformation and which contain no steps having major enthalpic impediments.

  DOI：

  10.1016/0020-1693(94)04265-w