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関連する概念動画

Chirality at Nitrogen, Phosphorus, and Sulfur02:30

Chirality at Nitrogen, Phosphorus, and Sulfur

5.9K
Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
5.9K
Prochirality02:05

Prochirality

3.9K
The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...
3.9K
Chirality02:25

Chirality

25.2K
Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
25.2K
Molecules with Multiple Chiral Centers02:25

Molecules with Multiple Chiral Centers

12.1K
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...
12.1K
¹H NMR Chemical Shift Equivalence: Enantiotopic and Diastereotopic Protons00:58

¹H NMR Chemical Shift Equivalence: Enantiotopic and Diastereotopic Protons

1.9K
Replacing each alpha-hydrogen in chloroethane by bromine (or a different functional group) yields a pair of enantiomers. Such protons are called prochiral or enantiotopic and are related by a mirror plane. Enantiotopic protons are chemically equivalent in an achiral environment. Because most proton NMR spectra are recorded using achiral solvents, enantiotopic hydrogens yield a single signal.
In chiral compounds such as 2-butanol, replacing the methylene hydrogens at C3 produces a pair of...
1.9K
Chirality in Nature02:30

Chirality in Nature

13.8K
Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.
13.8K

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関連する実験動画

Updated: Sep 9, 2025

Efficient Synthesis of All-Carbon Quaternary Centers via the Conjugate Addition of Functionalized Monoorganozinc Bromides
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Published on: May 26, 2019

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クイラル分子4f量子ビットは,ポスト機能化による.

Steen H Hansen1, Christian D Buch1, Bela E Bode2

  • 1Department of Chemistry, University of Copenhagen Universitetsparken 5 2100 Denmark piligkos@chem.ku.dk.

Inorganic chemistry frontiers
|September 3, 2025
PubMed
まとめ
この要約は機械生成です。

研究者はキラルアミンを用いて,エナティオメリックに純粋なイテルビウム (III) 複合体を合成した. これらのキラルイテルビウム (III) 複合体は,量子応用に不可欠な異なるスペクトル学的性質と長い電子回転相関時間を有する.

さらに関連する動画

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides CHIPS
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Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy
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Last Updated: Sep 9, 2025

Efficient Synthesis of All-Carbon Quaternary Centers via the Conjugate Addition of Functionalized Monoorganozinc Bromides
07:50

Efficient Synthesis of All-Carbon Quaternary Centers via the Conjugate Addition of Functionalized Monoorganozinc Bromides

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Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides CHIPS
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科学分野:

  • 協調化学
  • 材料科学
  • 量子情報科学

背景:

  • キラルランタニド複合体は,光学および磁気アプリケーションに興味があります.
  • ランタナイド複合体のキラリティと電子特性を制御することは,高度な材料の開発に不可欠です.

研究 の 目的:

  • エナティオメリックに純粋なイテルビウム (III) 複合体を合成し,特徴づけること.
  • これらのキラルイテルビウム (III) 複合体のスペクトル学的およびスピン特性を調査する.

主な方法:

  • キラルアミンによる凝縮による親Yb (III) 複合体のポスト機能化.
  • 単一結晶と粉末のX線 difraktionを構造的特徴化するために.
  • 近赤外線 (NIR) 円形のダイクロイズム (CD) と吸収スペクトル.
  • X帯パルス電子パラマグネティック共振 (EPR) スペクトロスコーピーは,磁気的に薄められた単一結晶を用いる.

主要な成果:

  • フラックパラメータがゼロに近いP212121空間群でX線微分によって確認されたYb (III) 複合体のエナティオメアペアの合成に成功した.
  • NIR CDと吸収スペクトルのf-f急変の観測は,g_abs値0.07までのキラルイテルビウム環境を示しています.
  • EPRスペクトロスコピーは,電子スピンの相記憶時間 (T_m) を600nsと示し,マイクロ波パルス (ラビニュテーション) による一貫した操作を証明した.

結論:

  • エナティオメリックに純粋なYb (III) コンプレックスは,ポスト機能化によって合成することができる.
  • これらのキラル・コンプレックスは 独特の光学特性を有し 長いスピンコヒーレンスを示し 量子技術の有望性を示しています
  • この研究は,量子コンピューティングやセンシングなどの分野におけるキラルランタニド複合体の可能性を強調しています.