1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8-Heptadecafluorotricosane | 871311-24-9

• 分子结构分类: 有机化合物 - 有机卤素化合物 - 有机氟化物
• 英文名称: 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8-Heptadecafluorotricosane
• CAS: 871311-24-9
• 化学式: C₂₃H₃₁F₁₇
• 分子量: 630.472
• InChiKey: XVPKYBWEMFZZBF-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  13.8
• 重原子数：
  40
• 可旋转键数：
  20
• 环数：
  0.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  17

反应信息

• 作为产物：
  描述：

  全氟辛基碘烷 、 1-十五碳烯 生成 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8-Heptadecafluorotricosane
  参考文献：
  名称：

  Branching of the Perfluorinated Chain Influences the Liquid-Crystalline Properties of Semifluorinated Alkanes: Perfluorooctyl- and Perfluoroisononyl-n-Alkanes—a Comparative Study

  摘要：

  Two series of semifluorinated-n-alkanes (SFAs) of comparable perfluorinated chain length but, different terminal group constitution, namely perfluoroctyl-n-alkanes [F-(CF2)(8)-(CH2)(n)-H, in, short F8Hn] and perfluoroisononyl-n-alkanes [(CF3)(2)CF(CF2)(6)-(CH2)(n)-H, in short iF9Hn] were synthesized. Their thermal properties were analyzed by means of differential scanning calorimetry (DSC), on both heating and cooling of the samples. The textures of the synthesized semi-fluorinated alkanes were investigated with the microscopy in polarized light. Similar to previously investigated perfluorodecyl-n-alkanes, perfluorooctyl-n-alkanes containing fewer than 12 methylene groups form smectic B phase. F8H8, F8H9, and F8H10 show a tendency to supercool and preserve smectic B ordering even below the transition temperature. For F8H11, the phase transition front smectic B to 3D crystal structure, manifesting itself as a rapid recrystallization., has been. observed. Perfluorooetyl-n-alkanes of 12 or more methylene groups do not form liquid-crystalline phases. In contrast to perfluorooctyl-n-alkanes, perfluoroisononyl-n-alkanes are not capable of liquid-crystalline phase formation, regardless of the hydrogenated moiety length and the experimental conditions.

  DOI：

  10.1080/15421400600700430