| 228117-26-8

• 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
• CAS: 228117-26-8
• 化学式: C₁₄₈H₂₉₂Si₂₉
• 分子量: 2886.43
• InChiKey: FVRHSEMOWMFZIK-UHFFFAOYSA-N

反应信息

• 作为产物：
  描述：

  乙烯基氯化镁 、 Tetrakis[2-[bis[2-[bis[2-[dichloro(methyl)silyl]ethyl]-methylsilyl]ethyl]-methylsilyl]ethyl]silane 以 四氢呋喃 为溶剂， 反应 720.0h， 以2.5 g的产率得到
  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