methyltris(methyldichlorosiloxy)silane | 127324-11-2

• 分子结构分类: 有机化合物 - 有机金属化合物 - 有机类金属化合物
• 英文名称: methyltris(methyldichlorosiloxy)silane
• 英文别名: tris[[dichloro(methyl)silyl]oxy]-methylsilane
• CAS: 127324-11-2
• 化学式: C₄H₁₂Cl₆O₃Si₄
• 分子量: 433.197
• InChiKey: NCUVAPVKCZFOIT-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.74
• 重原子数：
  17
• 可旋转键数：
  6
• 环数：
  0.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  27.7
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  methyltris(methyldichlorosiloxy)silane 以 水 、 丙酮 为溶剂， 反应 15.0h， 以20%的产率得到八甲基-POSS
  参考文献：
  名称：

  Problems of synthesis of tetrahedral organosilsesquioxanes. Hydrolytic condensation of hexafunctional branched organotetrasiloxanes

  摘要：

  The hydrolytic condensation of methyltris(methyldichlorosiloxy)silane (Ib), methyl(la), and vinyltris(methyldiethoxysiloxy)silanes (Ic) in dilute homogeneous solutions was studied. It was found by X-ray diffraction and H-1 NMR methods that, irrespective of reaction conditions, only octaorganooctasilsesquioxanes (T-8), namely, octamethyloctasilsesquioxane and 1,4-divinylhexamethyloctasilsesquioxane, were obtained instead of the expected tetraorganotetrasilsesquioxanes (T-4). These data suggest that the condensation processes involved in the hydrolysis of 1a-c are predominantly intermolecular, and the molecules of the starting oligomers do not undergo rearrangements. Probably, the formation of T-4, whose molecules are built of four strained six-membered organosiloxane cycles, is less favorable thermodynamically than the formation of their homologs (T-8) built of eight-membered organosiloxane cycles.

  DOI：

  10.1007/bf00700906
• 作为产物：
  描述：

  methyltris(methyldiethoxysiloxy)silane 在 氯化亚砜 作用下， 生成 methyltris(methyldichlorosiloxy)silane
  参考文献：
  名称：

  Rebrov, E. A.; Muzafarov, A. M.; Papkov, V. S., Doklady Chemistry, 1989, vol. 309, # 1-3, p. 339 - 342

  摘要：

  DOI：

文献信息

• Calorimetric study of siloxane dendrimer of the third generation with trimethylsilyl terminal groups
  作者：Semen S. Sologubov、Alexey V. Markin、Yuliya A. Sarmini、Yanina S. Samosudova、Natalia N. Smirnova、Konstantin L. Boldyrev、Elena A. Tatarinova、Ivan B. Meshkov、Aziz M. Muzafarov

  DOI：10.1007/s10973-019-08693-9

  日期：2019.12

  [H°(T) − H°(0)], the entropy [S°(T) − S°(0)], and the Gibbs energy [G°(T) − H°(0)] were calculated for the range from T → 0 to 570 K based on the experimentally determined molar heat capacity of the investigated compound. The standard entropy of formation ΔfS° of dendrimer G3[OSi(CH3)3]24 was evaluated at T = 298.15 K. The thermal stability of the studied compound was investigated by thermogravimetric

  第三代具有三甲基甲硅烷基末端基团G3 [OSi（CH 3）3 ] 24的第三代硅氧烷树状聚合物的摩尔热容通过精确绝热量热和差示扫描量热法在温度范围T  =（6-570）K上确定时间。在上述温度范围内观察到低温结构异常和玻璃化转变，并确定和分析了揭示的转变的标准热力学特征。基本的热力学函数，例如焓[ H °（T）  -H °（0）]，熵[ S °（T）  -S°（0）]和吉布斯能量[ G °（T）  -H °（0）]在T  →0至570 K的范围内根据实验确定的化合物的摩尔热容计算。形成Δ的标准熵˚F小号树枝状聚合物G3的°[OSi的（CH 3）3 ] 24在评价Ť  = 298.15 K.所研究的化合物的热稳定性通过热重分析调查。硅氧烷树枝状聚合物G3 [OSi（CH 3）3 ] 24的标准热力学性质 对比和讨论了先前报道的在表面层上具有不同功能端基的G3碳硅烷树枝状大分子的数据。
• Thermodynamic Properties of a First-Generation Siloxane Dendrimer with Terminal Trimethylsilyl Groups
  作者：A. V. Markin、Yu. A. Sarmini、S. S. Sologubov、N. N. Smirnova、K. L. Boldyrev、E. A. Tatarinova、I. B. Meshkov、A. M. Muzafarov

  DOI：10.1134/s0036024420020260

  日期：2020.2