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関連する概念動画

Stereoisomers02:32

Stereoisomers

13.0K
On the basis of mirror symmetry, stereoisomers of an organic molecule can be further classified into diastereomers and enantiomers. Diastereomers are stereoisomers that are not mirror images of each other. Substituted alkenes, such as the cis and trans isomers of 2-butene, are diastereomers, as these molecules exhibit different spatial orientations of their constituent atoms, are not mirror images of each other, and do not interconvert. Here, the interconversion is suppressed due to...
13.0K
Isomerism02:43

Isomerism

18.5K
Isomers are molecules with the same molecular formula but different structural arrangements. Isomers can be further classified into constitutional isomers and stereoisomers. Constitutional isomers differ in the connectivity of their constituent atoms. For example, 2-butanol and diethyl ether are constitutional isomers, as they have the same chemical formula, C4H10O, but differ in the connectivity of the carbon and oxygen atoms. Constitutional isomers have different physical and chemical...
18.5K
Stereoisomerism02:52

Stereoisomerism

12.0K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
12.0K
Stereoisomerism of Cyclic Compounds02:33

Stereoisomerism of Cyclic Compounds

8.9K
In this lesson, we delve into the role of ring conformation and its stability, which determines the spatial arrangement and, consequently, the molecular symmetry and stereoisomerism of cyclic compounds. 1,2-Dimethylcyclohexane is used as a case study to evaluate the possible number of stereoisomers. Here, given the multiple (n = 2) chiral centers, there are 2n = 4 possible configurations that lack a plane of symmetry, as the ring skeleton exists in a non-planar chair conformation. In addition,...
8.9K
Molecules with Multiple Chiral Centers02:25

Molecules with Multiple Chiral Centers

11.8K
Molecules that possess multiple chiral centers can afford a large number of stereoisomers. For instance, while some molecules like 2-butanol have one chiral center, defined as a tetrahedral carbon atom with four different substituents attached, several molecules like butane-2,3-diol have multiple chiral centers. A simple formula to predict the number of stereoisomers possible for a molecule with n chiral centers is 2n. However, there can be a lower number where some of the stereoisomers are...
11.8K
Fischer Projections02:18

Fischer Projections

13.3K
Learning to draw Fischer projections of molecules and understanding their relevance plays a crucial role in the visual depiction of organic molecules. A Fischer projection is a two-dimensional projection on a planar surface to simplify the three-dimensional wedge–dash representation of molecules. This is especially helpful in the case of molecules with multiple chiral centers that can be difficult to draw. Here, all the bonds of interest are represented as horizontal or vertical lines.
13.3K

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関連する実験動画

Updated: Jul 12, 2025

Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers
08:51

Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers

Published on: August 18, 2017

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相互変換する鏡像分子

Sojung F Kim1, Richmond Sarpong1

  • 1Department of Chemistry, University of California, Berkeley, Berkeley, CA, USA.

Science (New York, N.Y.)
|October 26, 2023
PubMed
まとめ
この要約は機械生成です。

新しい触媒は 混合物の分子ハンドル性を制御するために 光を使用します この進歩は様々な用途のために 特定のキラル分子を 作り出す新しい方法を提供します

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Light-driven Molecular Motors on Surfaces for Single Molecular Imaging
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Light-driven Molecular Motors on Surfaces for Single Molecular Imaging

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Spatial Separation of Molecular Conformers and Clusters
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Spatial Separation of Molecular Conformers and Clusters

Published on: January 9, 2014

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関連する実験動画

Last Updated: Jul 12, 2025

Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers
08:51

Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers

Published on: August 18, 2017

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Light-driven Molecular Motors on Surfaces for Single Molecular Imaging
08:40

Light-driven Molecular Motors on Surfaces for Single Molecular Imaging

Published on: March 13, 2019

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Spatial Separation of Molecular Conformers and Clusters
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Spatial Separation of Molecular Conformers and Clusters

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科学分野:

  • 化学について
  • 写真化学
  • カタリシス

背景:

  • 薬学や材料科学において 性性は極めて重要です
  • 分子混合物のキラリティを制御することは依然として大きな課題です.
  • キラル誘導のための効率的で選択的な方法を開発することは非常に望ましい.

研究 の 目的:

  • キラリティを高めるための新しい光駆動触媒を開発する
  • 分子混合物における触媒のマルチタスク能力を調査する.
  • アシンメトリック・シンセシスの新しいアプローチを実証する.

主な方法:

  • エナチオセレクティブ変換に光活性触媒を使用した.
  • 反応の進行とキラリティをモニターするために,スペクトロスコピック技術を使用した.
  • 分子混合物を分析し,エナティオメア過剰を定量化した.

主要な成果:

  • 触媒は,光照射下で分子混合物のキラリティを成功裏に強化した.
  • アクティベーションとキラル誘導を含む複数の機能を遂行する 触媒の能力を実証した.
  • 標的分子の高レベルのエナチオ選択性を達成した.

結論:

  • 光駆動の触媒は 分子キラリティを制御する強力なツールです
  • 開発されたマルチタスク触媒は,エナティオメリックに濃縮された化合物への効率的な経路を提供します.
  • この研究は,非対称合成とキラル材料設計の新たな道を開きます.