| 944128-26-1

• CAS: 944128-26-1
• 化学式: C₃₁H₄₅N₂Si₂Y
• 分子量: 590.789
• InChiKey: MJYLONAPJGGNTA-UHFFFAOYSA-N

反应信息

• 作为产物：
  描述：

  tris(trimethylsilylmethyl)yttrium(bis-tetrahydrofuran) 、 1-[2-(3H-inden-1-yl)ethyl]-3-(2,4,6-trimethylphenyl)imidazol-1-ium;bromide 在 KN(SiMe₃)2 作用下， 以 not given 为溶剂， 生成
  参考文献：
  名称：

  Synthesis of the First Rare Earth Metal Bis(alkyl)s Bearing an Indenyl Functionalized N-Heterocyclic Carbene

  摘要：

  Treatment of indenyl-modified imidazolium bromide [C9H7CH2CH2(NCHCHN(C6H2Me3-2,4,6)CH)Br] ((IndH-NHC-H)Br) with rare earth metal tetra(alkyl) lithium (Ln(CH2SiMe3)(4)Li(THF)(4)) or with (trimethylsilylmethyl)lithium (LiCH2SiMe3) and rare earth metal tris(alkyl)s (Ln(CH2SiMe3)(3)(THF)(2)) sequentially afforded the first NHC-stabilized monomeric rare earth metal bis(alkyl) complexes (Ind-NHC)Ln(CH2SiMe3)(2) (1, Ln = Y; 2, Ln = Lu; 3, Ln = Sc) via double-deprotonation reactions. Complexes 1-3 are THF-free isostructural monomers. The monoanionic Ind-NHC species bond to the central metal ion in a eta(5):kappa(1) constrained geometry configuration (CGC) mode, which combine with the two cis-located alkyl moieties to form a tetrahedron ligand core, leading to the chirality of the complexes. Under the presence of activators AlEt3 and [Ph3C][B(C6F5)(4)], complex 2 showed catalytic activity toward the polymerization of isoprene to afford 3,4-regulated polyisoprene (91%).

  DOI：

  10.1021/om0700922