2,6-diethoxy-2,6-dimethyl-2,6-disilaoxacyclohexane | 16957-07-6

• 英文名称: 2,6-diethoxy-2,6-dimethyl-2,6-disilaoxacyclohexane
• 英文别名: 2,6-diethoxy-2,6-dimethyl-[1,2,6]oxadisilinane；2,6-Dimethyl-2,6-diethoxy-1-oxa-2,6-disila-cyclohexan；2,6-Dimethyl-2,6-diethoxy-1-oxa-2,6-disilacyclohexan
• CAS: 16957-07-6
• 化学式: C₉H₂₂O₃Si₂
• 分子量: 234.443
• InChiKey: QRODKUMHUYIMEA-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.62
• 重原子数：
  14.0
• 可旋转键数：
  4.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  27.69
• 氢给体数：
  0.0
• 氢受体数：
  3.0

反应信息

• 作为反应物：
  描述：

  2,6-diethoxy-2,6-dimethyl-2,6-disilaoxacyclohexane 在 乙酰氯 作用下， 生成 2,6-Dimethyl-2,6-dichlor-1-oxa-2,6-disila-cyclohexan
  参考文献：
  名称：

  Synthesis and reactions of 6-chloro-2,2,6-trimethyl- and 2,6-dichloro-2,6-dimethyl-1-oxa-2,6-disilacyclohexanes

  摘要：

  DOI：

  10.1007/bf00601111
• 作为产物：
  描述：

  3-二乙氧基甲基硅基-1-丙烯 在 盐酸 、 dihydrogen hexachloroplatinate 、 水 作用下， 以 乙醇 、 苯 为溶剂， 反应 48.0h， 生成 2,6-diethoxy-2,6-dimethyl-2,6-disilaoxacyclohexane
  参考文献：
  名称：

  Cyclization Phenomena in the Sol−Gel Polymerization of α,ω-Bis(triethoxysilyl)alkanes and Incorporation of the Cyclic Structures into Network Silsesquioxane Polymers

  摘要：

  Intramolecular cyclizations during acid-catalyzed sol-gel polymerizations of alpha,omega-bis(triethoxysilyl)-alkanes substantially lengthen gel times for monomers with ethylene (1), propylene (2), and butylene (3) bridging groups. These cyclization reactions were found, using mass spectrometry and Si-29 NMR spectroscopy, to lead preferentially to monomeric and dimeric products based on six- and seven-membered disilsesquioxane rings. 1,2-Bis(triethoxysilyl)ethane (1) reacts under acidic conditions to give a bicyclic dimer (5) that is composed of two annelated seven-membered rings. Under the same conditions, 1,3-bis(triethoxysilyl)propane (2), 1,4-bis(triethoxysilyl)butane (3), and Z-1,4-bis(triethoxysilyl)but-2-ene (10) undergo an intramolecular condensation reaction to give the six- and seven-membered cyclic disilsesquioxanes 6, 7, and 11. Subsequently, these cyclic monomers slowly react to form the tricyclic dimers 8, 9, and 12. With NaOH as polymerization catalyst, these cyclic silsesquioxanes readily reacted to afford gels that were shown by CP MAS Si-29 NMR and infrared spectroscopies to retain some cyclic structures. Comparison of the porosity and microstructure of xerogels prepared from the cyclic monomers 6 and 7 with those of gels prepared directly from their acyclic precursors 2 and 3 indicates that the final pore structure of the xerogels is markedly dependent on the nature of the precursor. In addition, despite the fact that the monomeric cyclic disilsesquioxane species cannot be isolated from 1-3 under basic conditions due to their rapid rate of gelation, spectroscopic techniques also detected the presence of the cyclic structures in the resulting polymeric gels.

  DOI：

  10.1021/ja982751v

文献信息

• New silicon-containing heterocyclic rings derived from 1, 3-bis(methyldichlorosilyl)propane
  作者：K. A. Andrianov、L. M. Volkova、N. V. Delazari、L. I. Sosnovskaya、N. A. Chumaevskii

  DOI：10.1007/bf00945362

  日期：——