octa-n-propylsilsesquioxane | 18971-71-6

• 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: octa-n-propylsilsesquioxane
• 英文别名: octapropyl-pentacyclo[9.5.1.1^3,9.1^5,15.1^7,13]octasiloxane；Octapropyl-pentacyclo[9.5.1.1^3,9.1^5,15.1^7,13]octasiloxan；Octapropyl-octasilsesquioxan；1,3,5,7,9,11,13,15-Octapropyl-2,4,6,8,10,12,14,16,17,18,19,20-dodecaoxa-1,3,5,7,9,11,13,15-octasilapentacyclo[9.5.1.13,9.15,15.17,13]icosane
• CAS: 18971-71-6
• 化学式: C₂₄H₅₆O₁₂Si₈
• 分子量: 761.385
• InChiKey: RYJRHGCRSSWKIC-UHFFFAOYSA-N

物化性质

• 熔点：
  219-220 °C(Solv: acetone (67-64-1))
• 沸点：
  462.1±28.0 °C(Predicted)
• 密度：
  1.11±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  7.04
• 重原子数：
  44
• 可旋转键数：
  16
• 环数：
  6.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  111
• 氢给体数：
  0
• 氢受体数：
  12

反应信息

• 作为产物：
  描述：

  丙基三氯硅烷 生成 octa-n-propylsilsesquioxane
  参考文献：
  名称：

  Polycyclic methylpolysiloxanes

  摘要：

  公开号：

  US02418051A1

文献信息

• Semipräparative Trennung gemischt substituierter Octa-(organylsilsesquioxane) mittels Normal-Phase-HPLC und ihre 29Si-NMR-spektroskopische Unters
  作者：Benedikt J. Hendan、Heinrich C. Marsmann

  DOI：10.1016/0022-328x(94)87144-2

  日期：1994.12

  3-ClC3H6 (I), 3-IC3H6 (II), 3-HSC3H6 (III), C3H5 (IV) sowie R  C2H5, R′  C2H3 (V)) lassen sich mittels Normal-Phase-HPLC trennen. Sie können anhand der Signalverteilung im 29Si-NMR-Spektrum, hervorgerufen durch das jeweilige Substitutionsmuster, identifiziert werden. Die 29Si-chemische Verschiebung der R-substituierten Siliciumatome zeigt eine lineare Abhängigkeit von der Zahl der R′-substituierten Siliciumatome

  organotrichloro或organotrimethoxy硅烷共水解产生混合八- （organosilsesquioxanes），（硅8 ö 12）R 8- ñ R' Ñ（Ñ = 0，1，2（3个异构体）; RNC 3 ħ 7，R' 3-CLC 3 ħ 6（我），3-IC 3 ħ 6（II），3-HSC 3 ħ 6（III），C 3 H ^ 5（IV）和Rç 2 ħ 5，R'ç 2高3（五））; 它们可以通过正相HPLC分离。可以通过29个Si-NMR信号的分布来识别取代度和取代模式，其中观察到R取代的硅原子的化学位移对R'取代的邻居数的线性依赖性。AB]第三人以Cohydrolyse entsprechender Organotrichlor- UND -三甲氧基硅烷entstehende gemischt substituierte八溴（organylsilsesquioxane），（硅8
• Synthesis, structural characterization and properties of a cubic octa-n-propylsilsesquioxane inorganic–organic hybrid material
  作者：Hui Liu、Qingzeng Zhu、Lei Feng、Bingjian Yao、Shengyu Feng

  DOI：10.1016/j.molstruc.2012.07.045

  日期：2013.1

  n-Pr-POSS was synthesized by an acid-catalyzed hydrolytic condensation of n-propyltriethoxysilane with a 68.9% yield. Common organic solvents, such as benzene, chloroform, tetrahydrofuran, diethyl ether, dichloromethane, toluene, cyclohexane, hexane and pentane can be used to dissolve n-Pr-POSS; however, n-Pr-POSS is insoluble or poorly soluble in acetone, dichloroethane, chlorobenzene, dimethylformamide

  摘要 本文对立方八正丙基倍半硅氧烷(n-Pr-POSS)进行了合成、结构表征和性能研究。n-Pr-POSS 是通过酸催化的正丙基三乙氧基硅烷的水解缩合合成的，产率为 68.9%。常用有机溶剂，如苯、氯仿、四氢呋喃、乙醚、二氯甲烷、甲苯、环己烷、己烷、戊烷等均可溶解n-Pr-POSS；但是，n-Pr-POSS 不溶于或难溶于丙酮、二氯乙烷、氯苯、二甲基甲酰胺、二甲苯、甲醇、酒精和异丙醇。通过傅里叶变换红外光谱 (FTIR)、透射电子显微镜 (TEM)、光学显微镜、1H、13C 和 29Si 核磁共振 (NMR) 研究了 n-Pr-POSS 的立方结构和晶体形态，X 射线单晶衍射和 X 射线粉末衍射 (XRD) 方法。晶体 n-Pr-POSS 是一种具有 P-1 空间群的三斜晶系​​晶体。热重分析 (TGA) 表明 n-Pr-POSS 在 200 °C 以上开始升华，并且在氮气氛下直到 524
• X-ray Crystal Structures, Packing Behavior, and Thermal Stability Studies of a Homologous Series of <i>n</i>-Alkyl-Substituted Polyhedral Oligomeric Silsesquioxanes
  作者：Youssef El Aziz、Alan R. Bassindale、Peter G. Taylor、Richard A. Stephenson、Michael B. Hursthouse、Ross W. Harrington、William Clegg

  DOI：10.1021/ma302229v

  日期：2013.2.12

  The homologous series of octa-n-alkylsilsesquioxanes (n-alkylPOSS) was prepared by hydrosilylation of octahydrido-octasilses-quioxane H8T8 with terminal n-alkenes in good yields (n = 2-18). The compounds were characterized by NMR spectroscopy (H-1, C-13, Si-29), MALDI-TOF and ESI MS. Most of them have also been characterized using X-ray crystallography, including some polymorphs. The packing systems of the octa-n-alkylsilsesquioxanes are reported. Two types of packing have been observed, rod-like and disk-like (interdigitated). Some n-alkylPOSS crystals were formed in which the chains are tilted away from the axes of the cubic core. It was also observed that as alkyl-chains are flexible they can take up a variety of conformations. Melting points of the homologous series showed an odd-even alternating effect for alkyl chains longer than four CH2 units. The TGA of n-alkylPOSS under nitrogen showed that the thermal stability temperatures are between 200 and 400 degrees C. Pyrolysis-gas chromatography/mass spectrometry has been used to elucidate the thermal degradation process of T-8(n-CnH2n+1)(8) (n = 11 and 18). Thermal cracking along the whole alkyl chain was observed rather than simple loss of the complete arm.
• Alkylsilsesquioxanes
  申请人：DOW CORNING

  公开号：US02465188A1

  公开（公告）日：1949-03-22
• Silsesquioxane Molecules and Polystyrene Chains as a Model System for Colloid−Polymer Mixtures in the Protein Limit
  作者：Thomas Kramer、Ralf Schweins、Klaus Huber

  DOI：10.1021/ma048766x

  日期：2005.1.1

  The present work investigates the structure of large polysstyrene (PS) chains in two different solvents in the presence of octa-n-propylsilsesquioxane (SILS) molecules. Both sohent, are good Solvents for the PS chains. Viscosity measurements combined with static and dynamic light scattering revealed a significant shrinking of the PS chain dimensions, with increasing the SILS concentration. At the same time, chain-chain interactions decreased. Highly significant light scattering experiments became possible due to the fact that one of the solvents provided a refractivity which matched the scattering contrast of SILS, thus giving way to an unperturbed picture of the polymer chains. Together with the evaluation of the phase behavior of the PS-SILS mixture in toluene and in a theta-solvent. these results suggest that the PS-SILS mixture represents an interesting model system for colloid-polymer mixtures in the prottein limit. Supplementing SANS experiments on SILS in solutions of perdeuterated toluene with perdeuterated PS chains clearly indicated a zone depleted of SILS. In line with this, the crystallization tendency of SILS was increased with increasing PS concentration due to a condensation of SILS in polymer-free domains.