Benzoic acid, 4-[(4-butoxyphenyl)azo]-, ethyl ester, (E)- | 139056-47-6

• 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: Benzoic acid, 4-[(4-butoxyphenyl)azo]-, ethyl ester, (E)-
• CAS: 139056-47-6
• 化学式: C₁₉H₂₂N₂O₃
• 分子量: 326.395
• InChiKey: VLNKTAFYTGYXRY-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.46
• 重原子数：
  24.0
• 可旋转键数：
  8.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.32
• 拓扑面积：
  60.25
• 氢给体数：
  0.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  Benzoic acid, 4-[(4-butoxyphenyl)azo]-, ethyl ester, (E)- 在 吡啶 、 氯化亚砜 、 sodium hydroxide 作用下， 生成 (2-Oxochromen-6-yl) 4-[(4-butoxyphenyl)diazenyl]benzoate
  参考文献：
  名称：

  Synthesis and Physico-Chemical Properties for 2-Oxochromen-6-yl 4-(4-Alkoxyphenylazo)benzoates

  摘要：

  This paper describes the preparation and thermal properties for homologous series of 2-oxochromen-6-yl 4-(4-alkoxyphenylazo)benzoates (compounds 1-n). Compounds 1-n show nematic phase exclusively, where the nematic-isotropic phase transition temperatures are between 293 degrees C for 1-4 and 256 degrees C for 1-8. Interestingly, compound 1-8 exhibits smectic A and re-entrant nematic phases in addition to the nematic one. The smectic A phase are characterized using a small angle X-ray diffraction study, indicating the smectic A phase has a partially bilayer molecular arrangement.

  DOI：

  10.1080/15421400903060557
• 作为产物：
  描述：

  苯酚 在 盐酸 、 硫酸 、 potassium carbonate 、 sodium nitrite 作用下， 以 水 、 3-戊酮 为溶剂， 生成 Benzoic acid, 4-[(4-butoxyphenyl)azo]-, ethyl ester, (E)-
  参考文献：
  名称：

  Synthesis and Physico-Chemical Properties for 2-Oxochromen-6-yl 4-(4-Alkoxyphenylazo)benzoates

  摘要：

  This paper describes the preparation and thermal properties for homologous series of 2-oxochromen-6-yl 4-(4-alkoxyphenylazo)benzoates (compounds 1-n). Compounds 1-n show nematic phase exclusively, where the nematic-isotropic phase transition temperatures are between 293 degrees C for 1-4 and 256 degrees C for 1-8. Interestingly, compound 1-8 exhibits smectic A and re-entrant nematic phases in addition to the nematic one. The smectic A phase are characterized using a small angle X-ray diffraction study, indicating the smectic A phase has a partially bilayer molecular arrangement.

  DOI：

  10.1080/15421400903060557

文献信息

• Monotropic or enantiotropic mesophases? Liquid-crystalline and solid state polymorphism 4-Chloro-1,3-phenylene bis-[4-(4-alkyloxyphenylazo)benzoates
  作者：Izabela Niezgoda、Damian Pociecha、Zbigniew Galewski

  DOI：10.1016/j.tca.2014.04.024

  日期：2014.7

  This article presents a homologous series of bent-core molecules consisting of a 4-chlororesorcinol as a central unit and 4-[(4-alkyloxyphenyl)diazenyl]benzoic acids as wings. With the use of polarizing optical microscopy (POM), thermal analysis (TOA) and differential scanning calorimetry (DSC) the mesogenic properties were detected. Furthermore, the X-ray diffraction (XRD) measurements were also performed for selected samples. Compounds of the above mentioned series form nematic, B-6, and smectic C mesophases. An interesting phenomenon in the solid phase polymorphism was observed in some cases. In our experiment one crystalline form (CrI) melts to nematic phase while the second form (CrII)melts at higher temperature directly to isotropic phase. The solid state modification determines whether a monotropic and an enantiotropic mesophase is observed. (C) 2014 Elsevier B.V. All rights reserved.