(E)-1-{4-[(5-Bromopentyl)oxy]phenyl}-2-(4-methoxyphenyl)diazene | 224648-80-0

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 偶氮苯
• 英文名称: (E)-1-{4-[(5-Bromopentyl)oxy]phenyl}-2-(4-methoxyphenyl)diazene
• 英文别名: [4-(5-bromopentoxy)phenyl]-(4-methoxyphenyl)diazene
• CAS: 224648-80-0
• 化学式: C₁₈H₂₁BrN₂O₂
• 分子量: 377.281
• InChiKey: ITSOMHDVPLVKHU-UHFFFAOYSA-N

物化性质

• 熔点：
  104-105 °C(Solv: ethanol (64-17-5); heptane (142-82-5))
• 沸点：
  496.7±30.0 °C(Predicted)
• 密度：
  1.25±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  5.5
• 重原子数：
  23
• 可旋转键数：
  9
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  43.2
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  (E)-1-{4-[(5-Bromopentyl)oxy]phenyl}-2-(4-methoxyphenyl)diazene 在 potassium carbonate 、 对甲苯磺酸 作用下， 以 乙醇 、 N,N-二甲基甲酰胺 为溶剂， 反应 6.0h， 生成 1-[4-[5-[4-[(4-methoxyphenyl)diazenyl]phenoxy]pentoxy]phenyl]-N-[4-[5-[3-[[4-[5-[4-[(4-methoxyphenyl)diazenyl]phenoxy]pentoxy]phenyl]methylideneamino]phenoxy]pentoxy]phenyl]methanimine
  参考文献：
  名称：

  摘要：

  Three new homologous series of liquid crystal tetramers in which four mesogenic groups are linked via three alkyl spacers have been synthesised and characterised. In each series the length of the outer two spacers, n, is varied from 3 to 12 methylene units while the central spacer is held at 5 methylene units. The three series differ only in the substitution pattern around the inner two mesogenic units. The series in which the inner spacer is attached to the 4-position on both mesogenic groups is referred to as n-p5p-n while n-p5m-n refers to attachment at the 4-position on one group and the 3-position on the other. n-m5m-n refers to attachment at the 3-position on both groups. All the members of the n-p5p-n and n-p5m-n series exhibit nematic behaviour. The nematic-isotropic transition temperatures exhibit a pronounced alternation as the length and parity of the outer spacers are varied but which attenuates as n is increased. By contrast, the odd-even effects shown by the associated entropy changes are not attenuated as n is increased. 4-p5m-4 and 5-p5m-5 also exhibit smectic behaviour. 4-m5m-4 shows a nematic phase and an alternating smectic phase analogous in structure to that observed for certain semi-flexible main chain liquid crystal polymers. The n-m5m-n compounds with n = 6, 8, 9 and 10 also exhibit a nematic phase and a disordered crystalline phase. The trends in the transitional properties of the series are interpreted in terms of average molecular shapes and a model developed to understand the behaviour of liquid crystal dimers.

  DOI：

  10.1039/b104490g
• 作为产物：
  描述：

  甲氧苯胺 在 盐酸 、 sodium hydroxide 、 sodium carbonate 、 sodium nitrite 作用下， 以 乙醇 为溶剂， 生成 (E)-1-{4-[(5-Bromopentyl)oxy]phenyl}-2-(4-methoxyphenyl)diazene
  参考文献：
  名称：

  Ikeda, T.; Miyamoto, T.; Kurihara, S., Molecular Crystals and Liquid Crystals (1969-1991), 1990, vol. 182, p. 357 - 371

  摘要：

  DOI：

文献信息

• Ikeda, T.; Miyamoto, T.; Kurihara, S., Molecular Crystals and Liquid Crystals (1969-1991), 1990, vol. 182, p. 357 - 371
  作者：Ikeda, T.、Miyamoto, T.、Kurihara, S.、Tsukada, M.、Tazuke, S.

  DOI：——

  日期：——
• ——
  作者：Peter A. Henderson、Rachel T. Inkster、John M. Seddon、Corrie T. Imrie

  DOI：10.1039/b104490g

  日期：2001.10.23

  Three new homologous series of liquid crystal tetramers in which four mesogenic groups are linked via three alkyl spacers have been synthesised and characterised. In each series the length of the outer two spacers, n, is varied from 3 to 12 methylene units while the central spacer is held at 5 methylene units. The three series differ only in the substitution pattern around the inner two mesogenic units. The series in which the inner spacer is attached to the 4-position on both mesogenic groups is referred to as n-p5p-n while n-p5m-n refers to attachment at the 4-position on one group and the 3-position on the other. n-m5m-n refers to attachment at the 3-position on both groups. All the members of the n-p5p-n and n-p5m-n series exhibit nematic behaviour. The nematic-isotropic transition temperatures exhibit a pronounced alternation as the length and parity of the outer spacers are varied but which attenuates as n is increased. By contrast, the odd-even effects shown by the associated entropy changes are not attenuated as n is increased. 4-p5m-4 and 5-p5m-5 also exhibit smectic behaviour. 4-m5m-4 shows a nematic phase and an alternating smectic phase analogous in structure to that observed for certain semi-flexible main chain liquid crystal polymers. The n-m5m-n compounds with n = 6, 8, 9 and 10 also exhibit a nematic phase and a disordered crystalline phase. The trends in the transitional properties of the series are interpreted in terms of average molecular shapes and a model developed to understand the behaviour of liquid crystal dimers.