Dimesitylmethoxysilane | 51525-37-2

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: Dimesitylmethoxysilane
• 英文别名: Methoxybis(2,4,6-trimethylphenyl)silane；methoxy-bis(2,4,6-trimethylphenyl)silane
• CAS: 51525-37-2
• 化学式: C₁₉H₂₆OSi
• 分子量: 298.5
• InChiKey: MCTCVHYSSFYVCW-UHFFFAOYSA-N

物化性质

• 沸点：
  373.2±42.0 °C(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.02
• 重原子数：
  21
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.37
• 拓扑面积：
  9.2
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为产物：
  描述：

  甲醇 、 dimesitylsilylene 以 正己烷 为溶剂， 生成 Dimesitylmethoxysilane
  参考文献：
  名称：

  Fast Kinetics Study of the Reactions of Transient Silylenes with Alcohols. Direct Detection of Silylene−Alcohol Complexes in Solution

  摘要：

  The kinetic behavior of dimethyl-, diphenyl-, and dimesitylsilylene in hexanes solution in the presence of methanol (MeOH), tert-butanol (t-BuOH), and the respective O-deuterated isotopomers has been studied, with the goal of elucidating a detailed mechanism for the formal O-H insertion reaction of transient silylenes with alcohols in solution. The data are in all cases consistent with a mechanism involving the intermediacy off lie corresponding silylene-alcohol Lewis acid-base complexes, which have been detected directly for each of the SiMe2-ROL and SiPh2-ROL (L = H or D) systems that were studied. Complexation proceeds effectively irreversibly (K-cq >= 2 x 10(5) M-1) and at close to the diffusion-controlled rate in these cases. I it contrast, the kinetic and spectroscopic behavior observed for SiMes(2) in the presence of these alcohols indicates the SiMes(2)-ROL complexes are involved its steady-state intermediates. Formed reversibly and 10-100 times more Slowly than is the case with SiMe2 and SiPh2 Product formation from the silylene-alcohol complexes is shown to proceed via catalytic proton transfer by it second molecule of alcohol, the rate of which exceeds that of unimolecular intracomplex H-migration in all cases, even at submillimolar alcohol concentrations. The catalytic rate constants range from 10(9) to 10(10) M-1 s(-1) for the SiMe2-ROH and SiPh2-ROH complexes, sufficiently fast that the isotope effect ranges from ca. 2.5 to close to unity for all but the SiPh2-t-BuOL complex, where it is remarkably large (k(HH)/k(DD)= 10.8 +/- 2.4). The value is consistent with a mechanism for catalysis involving double proton transfer within it cyclic five-membered transition state. The isotope effects on the ratio of the rate Constants for Catalytic proton transfer and dissociation of the SiMes(2)-MeOH and SiMes(2),-t-BuOH complexes suggest that a different mechanism for catalytic proton transfer is involved in the case of the sterically hindered diarylsilylene.

  DOI：

  10.1021/om9009747

文献信息

• Photolysis of organopolysilanes. The synthesis and reactions of stable silacyclopropenes
  作者：Mitsuo Ishikawa、Kunio Nishimura、Hiroshi Sugisawa、Makoto Kumada

  DOI：10.1016/s0022-328x(00)86663-2

  日期：1980.7

  Two stable silacyclopropenes, 1,1-dimesityl-2,3-bis(trimethylsilyl)-1-silacyclopropene and 1,1-dimesityl-2-phenyl-3-trimethylsilyl-1-silacyclopropene, have been prepared by photolysis of 1,1-dimesityl-1-trimethylsilylethynyltrimethyldisilane and 1,1-dimesityl-1-phenylethynyldisilane, respectively. It has been found that these silacyclopropenes are not affected by atmospheric oxygen, moisture and alcohols

  通过1,1的光解反应制备了两种稳定的硅杂环基丙烯，1,1-二甲苯基-1,2,3-双（三甲基硅烷基）-1-硅环丙烯和1,1-二甲苯基-2-苯基-3-三甲基甲硅烷基-1-硅环丙烯。 -二甲硅烷基-1-三甲基甲硅烷基乙炔基三甲基乙硅烷和1，1-二甲硅烷基-1-苯基乙炔基乙硅烷。已经发现这些硅杂环丙烯在室温下不受大气氧，水分和醇的影响。由1-间甲苯基-1-苯基乙炔基四甲基二硅烷的光解法制得的1-间甲苯基-1-甲基-2-苯基-3-三甲基甲硅烷基-1-硅环环丙烯对大气中的氧非常稳定，但容易与苯中的甲醇反应生成环-打开甲氧基硅烷。已经研究了这些硅杂环丙烯的光化学和热行为。
• Reactions of oxasilacyclopropane. Generation of silanediyl by photo and thermal induced cycloelimination
  作者：Wataru Ando、Yoshitaka Hamada、Akira Sekiguchi

  DOI：10.1039/c39830000952

  日期：——

  Dimesitylsilanediyl was generated from photolysis and pyrolysis of the oxasilacyclopropane (1)via a [3 → 2 +1] cycloelimination reaction.

  通过[3→2 +1]环消除反应由草酰硅环丙烷（1）进行光解和热解生成二甲硅烷基二甲硅烷基。
• ISHIKAWA MITSUO; NISHIMURA KUNIO; SUGISAWA HIROSHI; KUMADA MAKOTO, J. ORGANOMETAL. CHEM., 1980, 194, NO 2, 147-158
  作者：ISHIKAWA MITSUO、 NISHIMURA KUNIO、 SUGISAWA HIROSHI、 KUMADA MAKOTO

  DOI：——

  日期：——
• ANDO, WATARU;HAMADA, YOSHITAKA;SEKIGUCHI, AKIRA, J. CHEM. SOC. CHEM. COMMUN., 1983, N 17, 952-954
  作者：ANDO, WATARU、HAMADA, YOSHITAKA、SEKIGUCHI, AKIRA

  DOI：——

  日期：——