一个高压碳化合物带的合成
Tan-Hao Shi1, Qing-Hui Guo1, Shuo Tong1
1MOE Key Laboratory of Bioorganic Phosphorous and Chemical Biology, Department of Chemistry, Tsinghua University, Beijing, 100084, China.
Journal of the American Chemical Society
|February 22, 2020
概括
化学家们为碳化合物带及其衍生物开发了一种新的单合成方法. 这种高效的方法可以为超分子化学和纳米技术应用创造新的带状分子.
科学领域:
- 有机化学
- 超分子化学
- 碳纳米材料
背景情况:
- 碳化合物带,包括带,是具有独特结构和特性的有趣分子.
- 它们的合成提出了重大挑战,限制了超分子化学和纳米科学的探索.
研究的目的:
- 为碳化合物带及其衍生物开发一种通用和高效的合成方法.
- 从可获得的原料中构建新的带状分子.
主要方法:
- 在一反应中利用分子内Friedel-Crafts化合成八基[8].
- 使用DDQ氧化的芳香化和随后的[4 + 2]循环添加反应.
- 在MALDI条件下通过反-迪尔斯-阿尔德反应生成完全合带[8]的.
主要成果:
- 通过操作简单的单反应成功合成了八水带.
- 生产了四基[8]arene-DDQ2,四基[8]arene-TCNE2和带[8]arene-DDQ4的添加物.
- 从带[8]arene-DDQ4添加物中观察到带[8]arene的形成,这是一个完全结合的碳化合物带.
结论:
- 建立了一个实用和通用的合成方法来构建碳化合物带.
- 这种新方法有助于制造带状分子,推进超分子化学和碳纳米科学.
相关概念视频
Conformations of Cycloalkanes
13.9K
Adolf von Baeyer attempted to explain the instabilities of small and large cycloalkane rings using the concept of angle strain — the strain caused by the deviation of bond angles from the ideal 109.5° tetrahedral value for sp3 hybridized carbons. However, while cyclopropane and cyclobutane are strained, as expected from their highly compressed bond angles, cyclopentane is more strained than predicted, and cyclohexane is virtually strain-free. Hence, Baeyer’s theory that...
13.9K
Conformations of Cyclohexane
14.9K
Cyclohexane does not exist in a planar form due to the high angle and torsional strain it would experience in the planar structure. Instead, it adopts non-planar chair and boat conformations.
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
14.9K
Conformations of Ethane and Propane
16.6K
In an organic molecule, free rotation about the carbon-carbon single bond results in energetically different conformers of the molecule. Due to this rotation, called the internal rotation, ethane has two major conformations — staggered and eclipsed.
Staggered conformation is a low energy and more stable conformation with the C-H bonds on the front carbon placed at 60°dihedral angles relative to the C-H bonds on the back carbon, leading to a reduced torsional strain. In staggered...
Staggered conformation is a low energy and more stable conformation with the C-H bonds on the front carbon placed at 60°dihedral angles relative to the C-H bonds on the back carbon, leading to a reduced torsional strain. In staggered...
16.6K
Stability of Conjugated Dienes
4.0K
Introduction
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
4.0K
Chair Conformation of Cyclohexane
17.7K
The chair conformation is the most stable form of cyclohexane due to the absence of angle and torsional strain. The absence of angle strain is a result of cyclohexane’s bond angle being very close to the ideal tetrahedral bond angle of 109.5° in its chair conformer. Similarly, the torsional strain is also absent owing to the perfectly staggered arrangement of bonds.
The hydrogen atoms linked to carbons are arranged in two different axial and equatorial orientations to achieve this...
The hydrogen atoms linked to carbons are arranged in two different axial and equatorial orientations to achieve this...
17.7K
Hybridization of Atomic Orbitals II
47.1K
sp3d and sp3d 2 Hybridization
47.1K


