[Silanetetrayltetra(ethane-2,1-diyl)]tetrakis[diethenyl(methyl)silane] | 146063-23-2

• 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: [Silanetetrayltetra(ethane-2,1-diyl)]tetrakis[diethenyl(methyl)silane]
• 英文别名: tetrakis[2-[bis(ethenyl)-methylsilyl]ethyl]silane
• CAS: 146063-23-2
• 化学式: C₂₈H₅₂Si₅
• 分子量: 529.148
• InChiKey: MSLKEHBNVCXWJX-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  9.55
• 重原子数：
  33
• 可旋转键数：
  20
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.43
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为反应物：
  描述：

  甲基二氯硅烷 、 [Silanetetrayltetra(ethane-2,1-diyl)]tetrakis[diethenyl(methyl)silane] 在 铂(0)-1,3-二乙烯-1,1,3,3-四甲基二硅氧烷 作用下， 以 四氢呋喃 、 5,5-dimethyl-1,3-cyclohexadiene 为溶剂， 反应 5.0h， 生成 Tetrakis[2-[bis[2-[dichloro(methyl)silyl]ethyl]-methylsilyl]ethyl]silane
  参考文献：
  名称：

  Synthesis of 1,4-Polybutadiene Dendrimer−Arborescent Polymer Hybrids

  摘要：

  A divergent synthetic scheme was developed for the preparation of high branching functionality hybrid polymers from carbosilane dendrimer substrates and polybutadiene side chains. Carbosilane dendrimers with 32, 64, or 128 peripheral Si-Cl functional groups were first coupled with 1,2-polybutadienyllithium chains having a number-average molecular weight M(n) approximate to 1000. The polybutadiene-grafted substrates were then hydrosilylated with dichloromethylsilane and reacted with high 1,4-microstructure content polybutadienyllithium chains to generate high branching functionality dendrimer arborescent hybrids. Three series of hybrid polymers were synthesized containing 1,4-polybutadiene side chains with M(n) approximate to 1500, 5000, or 30000. Size exclusion chromatography analysis of the polymers confirmed that a narrow molecular weight distribution was maintained (M(w)/M(n) <= 1.14). The branching functionality of the arborescent hybrids varied from 140-335, 160-1110, and 360-2830 for the 32-, 64-, and 128-site coupling precursors, respectively. The experimental branching functionalities attained were lower than the theoretical values due to decreased coupling efficiency within each series, in particular for polymers with longer polybutadiene side chains, apparently due to steric limitations in the grafting reaction.

  DOI：

  10.1021/ma1004056
• 作为产物：
  描述：

  乙烯基溴化镁 、 tetra-2-(dichloromethylsilyl)ethylsilane 生成 [Silanetetrayltetra(ethane-2,1-diyl)]tetrakis[diethenyl(methyl)silane]
  参考文献：
  名称：

  The synthesis and catalytic activity of poly(bis(imino)pyridyl) iron(II) metallodendrimer

  摘要：

  The first and second generation carbosilane dendrimers with silicon hydride terminated were synthesized, and then reacted with bis(imino)pyridyl containing allyl [4-CH2==CHCH2-2,6-(Pr2C6H3N)-Pr-i==CMe(C5H3N)MeC==N(2,6-'Pr2C6H3)], in the presence of H2PtCl6 as a hydrosilylation catalyst, to afford the first and second generation carbosilane supported ligands. Complexation reactions with FeCl(2)(.)4H(2)O give rise to iron-containing carbosilane dendrimers with FeCl2 moieties bound on the periphery. The metallodendrimers were used as catalyst precursors, activated with modified methylaluminoxane, for the polymerization of ethylene. In the case of low Al/Fe molar ratio, the metallodendrimers display much higher catalytic activity towards ethylene polymerization and produce much higher molecule weight polyethylenes than the corresponding single-nuclear complex under the same conditions. (C) 2004 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.jorganchem.2004.06.053

文献信息

• Synthesis of Water-Soluble Carbosilane Dendrimers
  作者：Shane W. Krska、Dietmar Seyferth

  DOI：10.1021/ja971865o

  日期：1998.4.1

  Nucleophilic reactions between mercapto-substituted amphiphiles and carbosilane dendrimers bearing (chloromethyl)silyl groups on their terminal branches gave, in high yields, amphiphilic dendrimers with hydrophobic carbosilane cores and alcohol, dimethylamino, or sodium sulfonate amphiphilic groups at the periphery. The negatively charged, sulfonate-terminated dendrimers were soluble in water, as were positively charged poly(ammonium) salts prepared from the dimethylamino-terminated derivatives. These new amphiphilic dendrimers were characterized by spectroscopic and mass spectrometric techniques. Preliminary studies of the aqueous solution behavior of the second generation, sulfonate-terminated dendrimer demonstrated its ability to enhance the solubility of lipophilic allyl-substituted benzene derivatives, a characteristic property of micelles.
• Polyanionic Carbosilane and Carbosiloxane Metallodendrimers Based on Cobaltabisdicarbollide Derivatives
  作者：Emilio José Juárez-Pérez、Clara Viñas、Francesc Teixidor、Rosario Núñez

  DOI：10.1021/om9005643

  日期：2009.9.28

  Carbosilane and carbosiloxane metallodendrimers that contain one, four, and eight peripheral cobaltabisdicarbollide derivatives have been synthesized using regiospecific hydrosilylation of vinyl-terminated dendrimers with Cs[1, 1'-mu-SiMeH-3,3'-Co(1,2-C2B9H10)(2)], 1. A methodology to synthesize a trifunctional molecule containing one cobaltabisdicarbollide and three vinylsilane moieties, 2, has been developed starting with tetravinylsilane. The first- and second-generation of anionic metallacarborane-containing metallodendrimers, 3, 4, and 5, were constructed via hydrosilylation of carbosilane dendrimers functionalized with four or eight vinyl functions, by using 1 as the hydrosilylation agent. Furthermore, it has been possible to apply this methodology to vinyl-terminated cyclocarbosiloxane dendrimers to yield metallodendrimers, 6, 7, and 8, which contain four (6) and eight (7, 8) peripheral cobaltabisdicarbollide units. Products are fully characterized by FTIR, NMR, and UV-vis spectroscopies. For metallodendrimers, the UV-vis absorptions have been a good tool for estimating the experimental number of cobaltabisdicarbollide moieties attached to the periphery and consequently to corroborate the good level of functionalization of the dendrimers. In addition, UV-vis spectroscopic measurements have also allowed the study of the solubility and behavior in water/DMSO solutions of these metallodendrimers.
• Preparation of Carbosilane Dendrimers and Their Characterization Using ¹H/¹³C/²⁹Si Triple Resonance 3D NMR Methods
  作者：Minghui Chai、Zhengjie Pi、Claire Tessier、Peter L. Rinaldi

  DOI：10.1021/ja9831812

  日期：1999.1.1

  In this paper we show the utility of H-1/C-13/Si-29 triple resonance, 3D, and pulse field gradient (PFG) NMR techniques for characterizing organosilicon based polymers. The dendrimers studied are first generation Si(CH2CH2SiHMe2)(4) and second generation Si[CH2CH2SiMe(CH2CH2SiHMe2)(2)](4) polycarbosilanes. The signals from one-bond and two-bond connectivities among H-1 atoms coupled to both C-13 and Si-29 at natural abundance have been selectively detected. The spectral dispersion and the atomic connectivity information present in the 3D NMR spectra provide resonance assignments and a definitive structure proof.
• The synthesis and catalytic activity of poly(bis(imino)pyridyl) iron(II) metallodendrimer
  作者：Zhan-Jiang Zheng、Jie Chen、Yue-Sheng Li

  DOI：10.1016/j.jorganchem.2004.06.053

  日期：2004.9

  The first and second generation carbosilane dendrimers with silicon hydride terminated were synthesized, and then reacted with bis(imino)pyridyl containing allyl [4-CH2==CHCH2-2,6-(Pr2C6H3N)-Pr-i==CMe(C5H3N)MeC==N(2,6-'Pr2C6H3)], in the presence of H2PtCl6 as a hydrosilylation catalyst, to afford the first and second generation carbosilane supported ligands. Complexation reactions with FeCl(2)(.)4H(2)O give rise to iron-containing carbosilane dendrimers with FeCl2 moieties bound on the periphery. The metallodendrimers were used as catalyst precursors, activated with modified methylaluminoxane, for the polymerization of ethylene. In the case of low Al/Fe molar ratio, the metallodendrimers display much higher catalytic activity towards ethylene polymerization and produce much higher molecule weight polyethylenes than the corresponding single-nuclear complex under the same conditions. (C) 2004 Elsevier B.V. All rights reserved.
• Synthesis of 1,4-Polybutadiene Dendrimer−Arborescent Polymer Hybrids
  作者：Mario Gauthier、Abdul Munam

  DOI：10.1021/ma1004056

  日期：2010.4.27

  A divergent synthetic scheme was developed for the preparation of high branching functionality hybrid polymers from carbosilane dendrimer substrates and polybutadiene side chains. Carbosilane dendrimers with 32, 64, or 128 peripheral Si-Cl functional groups were first coupled with 1,2-polybutadienyllithium chains having a number-average molecular weight M(n) approximate to 1000. The polybutadiene-grafted substrates were then hydrosilylated with dichloromethylsilane and reacted with high 1,4-microstructure content polybutadienyllithium chains to generate high branching functionality dendrimer arborescent hybrids. Three series of hybrid polymers were synthesized containing 1,4-polybutadiene side chains with M(n) approximate to 1500, 5000, or 30000. Size exclusion chromatography analysis of the polymers confirmed that a narrow molecular weight distribution was maintained (M(w)/M(n) <= 1.14). The branching functionality of the arborescent hybrids varied from 140-335, 160-1110, and 360-2830 for the 32-, 64-, and 128-site coupling precursors, respectively. The experimental branching functionalities attained were lower than the theoretical values due to decreased coupling efficiency within each series, in particular for polymers with longer polybutadiene side chains, apparently due to steric limitations in the grafting reaction.