1-bromo-1-(1,1,7,7-tetraethyl-3,3,5,5-tetramethyl-s-hydrindacen-4-yl)-2,3-bis(trimethylsilyl)-1-silacycloprop-2-ene | 1349883-24-4

• 分子结构分类: 有机化合物 - 苯类化合物 - 茚满类
• 英文名称: 1-bromo-1-(1,1,7,7-tetraethyl-3,3,5,5-tetramethyl-s-hydrindacen-4-yl)-2,3-bis(trimethylsilyl)-1-silacycloprop-2-ene
• 英文别名: [1-Bromo-1-(1,1,7,7-tetraethyl-3,3,5,5-tetramethyl-2,6-dihydro-s-indacen-4-yl)-3-trimethylsilylsiliren-2-yl]-trimethylsilane；[1-bromo-1-(1,1,7,7-tetraethyl-3,3,5,5-tetramethyl-2,6-dihydro-s-indacen-4-yl)-3-trimethylsilylsiliren-2-yl]-trimethylsilane
• CAS: 1349883-24-4
• 化学式: C₃₂H₅₅BrSi₃
• 分子量: 603.949
• InChiKey: PLSSXXJSUHRXJN-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  9.86
• 重原子数：
  36
• 可旋转键数：
  7
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.75
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为产物：
  描述：

  tribromo(1,1,7,7-tetraethyl-3,3,5,5-tetramethyl-s-hydrindacen-4-yl)silane 在 萘 、 lithium 作用下， 以 四氢呋喃 、 甲苯 为溶剂， 生成 1-bromo-1-(1,1,7,7-tetraethyl-3,3,5,5-tetramethyl-s-hydrindacen-4-yl)-2,3-bis(trimethylsilyl)-1-silacycloprop-2-ene
  参考文献：
  名称：

  Room-Temperature Dissociation of 1,2-Dibromodisilenes to Bromosilylenes

  摘要：

  A room-temperature dynamic equilibrium between dibromodisilenes and bromosilylenes has been demonstrated by taking advantage of the steric protection using the fused-ring bulky 1,1,3,3,5,5,7,7-octa-R-s-hydrindacen-4-yl (Rind) groups. Although the bromosilylenes cannot be directly observed by spectroscopic methods, the thermal homolytic cleavage of the Si=Si double bond has been confirmed by a pseudo-first-order kinetics for the trapping with bis(trimethylsilyl)acetylene and a crossover reaction using two kinds of Rind-substituted dibromodisilenes. The addition of 4-pyrrolidinopyridine (PPy) to the dibromodisilene leads to an equilibrium mixture between the dibromodisilene and a PPy adduct of bromosilylene, the latter being isolated and characterized. The substitution of the bromine atom in the dibromodisilene by the Grignard reagent is significantly accelerated by the addition of PPy.

  DOI：

  10.1021/ja209736d

文献信息

• Room-Temperature Dissociation of 1,2-Dibromodisilenes to Bromosilylenes
  作者：Katsunori Suzuki、Tsukasa Matsuo、Daisuke Hashizume、Kohei Tamao

  DOI：10.1021/ja209736d

  日期：2011.12.14

  A room-temperature dynamic equilibrium between dibromodisilenes and bromosilylenes has been demonstrated by taking advantage of the steric protection using the fused-ring bulky 1,1,3,3,5,5,7,7-octa-R-s-hydrindacen-4-yl (Rind) groups. Although the bromosilylenes cannot be directly observed by spectroscopic methods, the thermal homolytic cleavage of the Si=Si double bond has been confirmed by a pseudo-first-order kinetics for the trapping with bis(trimethylsilyl)acetylene and a crossover reaction using two kinds of Rind-substituted dibromodisilenes. The addition of 4-pyrrolidinopyridine (PPy) to the dibromodisilene leads to an equilibrium mixture between the dibromodisilene and a PPy adduct of bromosilylene, the latter being isolated and characterized. The substitution of the bromine atom in the dibromodisilene by the Grignard reagent is significantly accelerated by the addition of PPy.