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Updated: Sep 20, 2025

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units
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Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units

Published on: September 18, 2016

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带有四个螺旋转的螺旋体: [13]螺旋体对 [27]螺旋体的二元化

Matea Sršen1, Stephan K Pedersen1, Tomislav Rožić1

  • 1Department of Chemistry, University of Copenhagen, Universitetsparken 5, Copenhagen Ø, DK2100, Denmark.

Angewandte Chemie (International ed. in English)
|May 27, 2025
PubMed
概括

研究人员合成了新的四螺旋旋转有机分子,称为异螺旋. 这些分子表现出强烈的循环极化发光 (CPL),为先进的光学材料提供了新的可能性.

关键词:
奇拉性是一种精神性.希利塞内斯 (Helicenes) 是一种直升机.非平面芳香化合物 不平面芳香化合物结构财产关系 结构财产关系合成方法 合成方法

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Structure of HIV-1 Capsid Assemblies by Cryo-electron Microscopy and Iterative Helical Real-space Reconstruction12:38

Structure of HIV-1 Capsid Assemblies by Cryo-electron Microscopy and Iterative Helical Real-space Reconstruction

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Aromatic Hydrocarbon Cations: Structural Overview

Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...
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Stability of Conjugated Dienes

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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.
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