| 292856-03-2

• CAS: 292856-03-2
• 化学式: C₁₉H₃BF₁₅*C₂₀H₃₀Al
• 分子量: 824.46
• InChiKey: JQTPYODRBQBRQF-UHFFFAOYSA-N

反应信息

• 作为产物：
  描述：

  aluminum;carbanide;1,2,3,4,5-pentamethylcyclopenta-1,3-diene 、 三(五氟苯基)硼烷 以 二氯甲烷 为溶剂， 以83%的产率得到
  参考文献：
  名称：

  Bis(permethylcyclopentadienyl)aluminum Compounds:  Precursors to [Cp*₂Al]⁺ but Not to Cp*₃Al

  摘要：

  Replacement of only two chloride ligands occurs when AlCl3 is reacted with 3 equiv of either Cp*Na or Cp*K, forming Cp*2AlCl (1) [Cp* = C5Me5]. This compound dissociates a chloride ion in polar solvents such as methylene chloride. Clean formation of decamethyl-aluminocenium salts could not be accomplished by abstraction of a chloride ligand from 2 with silver salts, LiB(C6F5)(4), or NaB(C6F5)(4) However, reaction of Cp*2AlMe (2) with B(C6F5)(3). cleanly affords the salt [CP*2Al](+) [B(C6F5)(3)Me](-) (3). X-ray crystal structures of both 2 and 3 are reported. In the solid state, 2 exhibits a bis-dihapto ring coordination similar to that of (eta(2)-C5H5)(2)AlMe. The molecular structure of 3 shows complete methyl anion abstraction from the aluminum. The decamethylaluminocenium salt is more stable in solution than its nonmethylated analogue; however, it is also considerably less active as an initiator for the cationic polymerization of isobutene.

  DOI：

  10.1021/om000173x