2-((dimethyl)sila)-1,3-propanediyl-(η(5)-pentamethylcyclopentadienyl)pyridinechromium(III) | 219146-17-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡啶及其衍生物
• 英文名称: 2-((dimethyl)sila)-1,3-propanediyl-(η(5)-pentamethylcyclopentadienyl)pyridinechromium(III)
• 英文别名: chromium(3+);dimethanidyl(dimethyl)silane;1,2,3,4,5-pentamethylcyclopenta-1,3-diene;pyridine
• CAS: 219146-17-5
• 化学式: C₁₉H₃₀CrNSi
• 分子量: 352.535
• InChiKey: SMLIZGTWUFLNPG-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：

  吡啶 、 [(η5-C5Me5)Cr(CH2SiMe3)2] 在 THF 作用下， 以 四氢呋喃 为溶剂， 以68%的产率得到2-((dimethyl)sila)-1,3-propanediyl-(η(5)-pentamethylcyclopentadienyl)pyridinechromium(III)
  参考文献：
  名称：

  Structure and Reactivity of Trimethylsilylmethyl Complexes of Chromium, Including the 13-Electron Alkyl Cp*Cr(CH₂SiMe₃)₂

  摘要：

  Alkylation of Cp*Cr(THF)Cl-2 with 1 or 2 equiv of LiCH2SiMe3 yielded the paramagnetic chromium alkyls [Cp*Cr(mu-Cl)(CH2SiMe3)](2) (1), Cp*Cr(CH2SiMe3)(2) (2), and Cp*Cr(L)(CH2SiMe3)(2) (3a, L = py; 3b, L = THF). Compound 2 isa coordinatively unsaturated, pseudo-five-coordinate Cr-III complex with a 13-electron configuration, and it catalyzes the polymerization of ethylene. The thermal decomposition of 2 in noncoordinating solvents proceeded via an intermediate, namely the bis(mu-alkylidene) complex [Cp*Cr(mu-CHSi(CH3)(3))](2) (4). Compound 4 suffered reductive elimination to yield the dinuclear Cr-II alkyl Cp*Cr-2(2)(mu-CH2Si(CH3)(2)CH2-mu-CHSi(CH3)(3)) (5). In contrast, the decomposition of 2 in THF, i.e., 3b, yielded the metallacycles Cp*Cr(L)(CH2)(2)Si(CH3)(3)) (6a, L = py; 6b, L = THF). Compounds 1, 2, 3b, 4, and 5 have been structurally characterized by X-ray diffraction. The reactions of 2 are rationalized in terms of competing alpha- and gamma-hydrogen elimination processes yielding terminal alkylidene and metallacyclobutane intermediates existing in equilibrium.

  DOI：

  10.1021/om980796z