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関連する概念動画

Diazonium Group Substitution: –OH and –H01:19

Diazonium Group Substitution: –OH and –H

3.3K
Nitrous acid, a weak acid, is prepared in situ via the reaction of sodium nitrite with a strong acid under cold conditions. This nitrous acid prepared in situ reacts with primary arylamines to form arenediazonium salts. Such reactions are known as diazotization reactions. As shown in Figure 1, the formation of arenediazonium salts begins with the decomposition of nitrous acid in an acidic solution to give nitrosonium ions.
3.3K
Stability of Substituted Cyclohexanes02:30

Stability of Substituted Cyclohexanes

14.9K
This lesson discusses the stability of substituted cyclohexanes with a focus on energies of various conformers and the effect of 1,3-diaxial interactions.
The two chair conformations of cyclohexanes undergo rapid interconversion at room temperature. Both forms have identical energies and stabilities, each comprising equal amounts of the equilibrium mixture. Replacing a hydrogen atom with a functional group makes the two conformations energetically non-equivalent.
For example, in...
14.9K
Nucleophilic Substitution Reactions02:34

Nucleophilic Substitution Reactions

19.2K
Historical perspective
In 1896, the German chemist Paul Walden discovered that he could interconvert pure enantiomeric (+) and (-) malic acids through a series of reactions. This conversion suggested the involvement of optical inversion during the substitution reaction. Further, in 1930, Sir Christopher Ingold described for the first time two different forms of nucleophilic substitution reactions, which are known as SN1 (nucleophilic substitution unimolecular) and SN2 (nucleophilic substitution...
19.2K
¹H NMR of Labile Protons: Deuterium (²H) Substitution00:48

¹H NMR of Labile Protons: Deuterium (²H) Substitution

1.3K
This lesson illustrates the role of deuterium substitution in simplifying the NMR spectrum of compounds comprising labile protons. One method employed is the use of deuterium. Amongst the three isotopes of hydrogen, deuterium (2H) has a nucleus composed of one proton and one neutron. When the D2O solvent is added to a pure dry ethanol solution, its labile proton is substituted with deuterium.
1.3K
Nucleophilic Aromatic Substitution: Addition–Elimination (SNAr)01:30

Nucleophilic Aromatic Substitution: Addition–Elimination (SNAr)

4.7K
Nucleophilic substitution in aromatic compounds is feasible in substrates bearing strong electron-withdrawing substituents positioned ortho or para to the leaving group. The reaction proceeds via two steps: the addition of the nucleophile and the elimination of the leaving group.
The reaction begins with an attack of the nucleophile on the carbon that holds the leaving group. This results in the delocalization of the π electrons over the ring carbons. The resonance interaction between...
4.7K
Predicting Products: Substitution vs. Elimination02:52

Predicting Products: Substitution vs. Elimination

13.9K
When a nucleophile and an alkyl halide react, nucleophilic substitution and β-elimination reactions compete to generate products.
The following factors can influence the mechanisms competing against each other:
13.9K

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関連する実験動画

Updated: Jan 27, 2026

Isolating Free Carbenes, their Mixed Dimers and Organic Radicals
10:44

Isolating Free Carbenes, their Mixed Dimers and Organic Radicals

Published on: April 19, 2019

11.6K

金 ((III) 代用カルベン

Rui Wei1, Shuo Li1, Nina Albouy2

  • 1Laboratoire Hétérochimie Fondamentale et Appliquée (LHFA, UMR 5069), CNRS/Université de Toulouse, 31062 Toulouse, France.

Journal of the American Chemical Society
|January 26, 2026
PubMed
まとめ
この要約は機械生成です。

新しい金 (III) 代用ダイアゾ化合物が合成され,光分解してカルベンを生成した. これらのカルベンは 独特の分子内および分子間反応性を示し, 金カルベンの化学的性質の洞察を提供した.

さらに関連する動画

Luminophore Formation in Various Conformations of Bovine Serum Albumin by Binding of GoldIII
08:26

Luminophore Formation in Various Conformations of Bovine Serum Albumin by Binding of GoldIII

Published on: August 31, 2018

7.3K
Photogeneration of N-Heterocyclic Carbenes: Application in Photoinduced Ring-Opening Metathesis Polymerization
12:19

Photogeneration of N-Heterocyclic Carbenes: Application in Photoinduced Ring-Opening Metathesis Polymerization

Published on: November 29, 2018

9.0K

関連する実験動画

Last Updated: Jan 27, 2026

Isolating Free Carbenes, their Mixed Dimers and Organic Radicals
10:44

Isolating Free Carbenes, their Mixed Dimers and Organic Radicals

Published on: April 19, 2019

11.6K
Luminophore Formation in Various Conformations of Bovine Serum Albumin by Binding of GoldIII
08:26

Luminophore Formation in Various Conformations of Bovine Serum Albumin by Binding of GoldIII

Published on: August 31, 2018

7.3K
Photogeneration of N-Heterocyclic Carbenes: Application in Photoinduced Ring-Opening Metathesis Polymerization
12:19

Photogeneration of N-Heterocyclic Carbenes: Application in Photoinduced Ring-Opening Metathesis Polymerization

Published on: November 29, 2018

9.0K

科学分野:

  • 有機金属化学
  • 写真化学
  • 炭酸塩化学

背景:

  • 金 (III) 複合体は,そのユニークな電子およびステリック特性のためにますます研究されています.
  • ディアゾ化合物は,カルベンの生成のための汎用的な前駆体として機能する.
  • カーベンの反応性を理解することは,新しい合成方法論の開発に不可欠です.

研究 の 目的:

  • Au (III) で置換された新しいダイアゾ化合物を合成し,特徴づけること.
  • Au (III) -カルベンの光分解生成と反応性を調査する.
  • 計算的方法を用いてカルベンの行動に対する置換物の影響を探求する.

主な方法:

  • リチウム化ダイアゾ化合物との反応によるAu (III) 置換ダイアゾ化合物の合成.
  • ダイナトゲン流出とカルベンの形成を誘導する紫外線照射による光分解.
  • カーベンの特徴は,光学技術とX線結晶学を用いる.
  • 構造と反応性の分析のための密度関数理論 (DFT) の計算.

主要な成果:

  • Au (III) で置換されたダイアゾ化合物 (N^C^C) AuC (N2) R (R = Dmp, SiMe3) の成功合成
  • 光分解性ダイナトゲン挤出により生成されたAu (III) -カルベン.
  • (N^C^C) Au-C-Dmpカルベンは,分子内C-H挿入とβ-H除去を受けた.
  • (N^C^C) Au-C-SiMe3カルベンは,溶液中のシングレットカルベンの反応性とトリプルカルベンの反応性を両方示した.
  • DFTの計算は,カルベンの構造,結合,反応メカニズムに関する洞察を提供した.

結論:

  • 新しいAu (III) -カルベンは,ダイアゾ前駆体から光分解的に生成することができる.
  • Au (III) -カルベンの反応性は,置換物のステリックおよび電子因子によって影響を受けます.
  • これらの発見は,オーガノゴールド化学とカルベンの変換の範囲を拡大します.