Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Carbocations02:10

Carbocations

10.9K
Carbocations are one of the reaction intermediates formed during several nucleophilic substitutions or elimination reactions. A carbocation is an electron-deficient species with the central carbon atom having six electrons and three bonded atoms. The central carbon in a carbocation is sp2 hybridized with trigonal planar geometry. It has an empty p orbital perpendicular to the plane of the structure that can accept electrons. Thus, carbocations act as strong electrophiles and may react with any...
10.9K
Electron Carriers01:24

Electron Carriers

84.1K
Electron carriers can be thought of as electron shuttles. These compounds can easily accept electrons (i.e., be reduced) or lose them (i.e., be oxidized). They play an essential role in energy production because cellular respiration is contingent on the flow of electrons.
Over the many stages of cellular respiration, glucose breaks down into carbon dioxide and water. Electron carriers pick up electrons lost by glucose in these reactions, temporarily storing and releasing them into the electron...
84.1K
Vicinal Diols via Reductive Coupling of Aldehydes or Ketones: Pinacol Coupling Overview01:27

Vicinal Diols via Reductive Coupling of Aldehydes or Ketones: Pinacol Coupling Overview

1.7K
Wilhelm Rudolph Fittig discovered the pinacol coupling reaction in 1859. It is a radical dimerization reaction and involves the reductive coupling of aldehydes or ketones in the presence of hydrocarbon solvent to yield vicinal diols.
1.7K
Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

1.8K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
1.8K
Alcohols from Carbonyl Compounds: Reduction02:23

Alcohols from Carbonyl Compounds: Reduction

10.2K
Reduction is a simple strategy to convert a carbonyl group to a hydroxyl group. The three major pathways to reduce carbonyls to alcohols are catalytic hydrogenation, hydride reduction, and borane reduction.
Catalytic hydrogenation is similar to the reduction of an alkene or alkyne by adding H2 across the pi bond in the presence of transition metal catalysts like Raney Ni, Pd–C, Pt, or Ru. Aldehydes and ketones can be reduced by this method, often under mild to moderate heat (25–100°C) and...
10.2K
Aldehydes and Ketones with HCN: Cyanohydrin Formation Mechanism01:10

Aldehydes and Ketones with HCN: Cyanohydrin Formation Mechanism

3.0K
Cyanohydrins are formed when cyanide nucleophiles and carbonyl compounds like aldehydes and ketones react. A strong base, the cyanide ion, catalyzes cyanohydrin formation. The ions are generated from HCN under aqueous conditions. Once the cyanide ions are generated, the first step involves the nucleophilic attack of the cyanide ions on the electrophilic carbonyl carbon. This attack shifts the π electrons from the C=O to the oxygen atom forming the alkoxide ion intermediate. The alkoxide anion...
3.0K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

A Synthetic Iron Model of Carbon-Sulfur Bond Activation by the Nitrogenase-Family Enzyme Methylthio-Alkane Reductase.

Journal of the American Chemical Society·2026
Same author

Iron Complexes Supported by a Dual Dearomatized PNPN Ligand.

Inorganic chemistry·2026
Same author

Photodriven Sm-Catalyzed Asymmetric Ketyl-Olefin Coupling.

Journal of the American Chemical Society·2026
Same author

Remote Positioning of Cations Tunes Catalytic Fe-Mediated Nitrogen Fixation Selectivity for Hydrazine Instead of Ammonia in Protic Media.

Angewandte Chemie (International ed. in English)·2026
Same author

Tunable Multisite Proton-Coupled Electron Transfer Mediators: Distinct Pathways for Substrate Reduction Versus Competing Hydrogen Evolution.

Journal of the American Chemical Society·2026
Same author

Cation Competition Experiments during Electrochemical CO<sub>2</sub> Reduction As a Probe of the Film-Modified Copper Microenvironment.

Journal of the American Chemical Society·2025

関連する実験動画

Updated: Jun 9, 2025

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

10.7K

カルボラン由来陽子結合電子移転反応体

Enric H Adillon1, Jonas C Peters1

  • 1Division of Chemistry and Chemical Engineering, California Institute of Technology (Caltech), Pasadena, California 91125, United States.

Journal of the American Chemical Society
|October 28, 2024
PubMed
まとめ

研究者は,還元電解の代用品としてカルボランを調査した. 彼らはこれらのカルボランが 協調された陽子-電子伝送経路ではなく 電子伝送経路による多電子/陽子の減少を促進することを発見した.

科学分野:

  • 非有機化学
  • 電気化学
  • 有機合成

背景:

  • 協調型陽子電子伝送 (CPET) は,段階的な電子伝送 (ET) や陽子伝送 (PT) よりも低い反応障壁を提供します.
  • コバルトセンのET部位とアリラミンのPT部位を結合すると,還元性電気触媒作用が可能になる.
  • 還元型変換を進めるためには,CPETのような反応性の代替枠組みを探求することが不可欠です.

研究 の 目的:

  • 還元電解におけるコバルトセンの代用品としてのC,C'-ディアリル-オ-カルボランを調査する.
  • ダイアリル・オ・カルボランの酸化還元特性とプロトネーションの性質を記述する.
  • カーボランによる減少のメカニズム的経路 (CPET対ET/PT) を決定する.

主な方法:

  • ディアリル・オ・カーボランの合成と特徴付け
  • 電気化学的還元とプロトネーションの研究
  • 有効な結合解離自由エネルギー (BDFEeff) を決定する熱力学的測定.
  • 縮小カルボラン種の結晶分析
  • マルチET/PT還元と水素進化反応 (HER) のメカニズム研究

主要な成果:

さらに関連する動画

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy
07:36

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy

Published on: November 9, 2019

8.0K
1,3,5-Triphenylbenzene and Corannulene as Electron Receptors for Lithium Solvated Electron Solutions
06:56

1,3,5-Triphenylbenzene and Corannulene as Electron Receptors for Lithium Solvated Electron Solutions

Published on: October 10, 2016

7.7K

関連する実験動画

Last Updated: Jun 9, 2025

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

10.7K
Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy
07:36

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy

Published on: November 9, 2019

8.0K
1,3,5-Triphenylbenzene and Corannulene as Electron Receptors for Lithium Solvated Electron Solutions
06:56

1,3,5-Triphenylbenzene and Corannulene as Electron Receptors for Lithium Solvated Electron Solutions

Published on: October 10, 2016

7.7K
  • ダイアリル・オ・カーボランは合成され,特徴づけられ,安定した酸化還元作用を示した.
  • 陽子化されたカルボランは,低BDFEeffの31 kcal/molのN-H結合を生成した.
  • 還元カルボランの固体構造は,それらの酸化還元特性についての洞察を提供した.
  • カーボラン媒介剤はアゾアレン,ディフェニルフーマレート,ニトロトルエンのマルチET/PT減量を促進した.
  • CPET経路とは異なる速度を制限するETステップを示した.

    • 結論:

    • ダイアリル・オ・カルボランは,マルチET/PTの減少に有効な媒介剤として機能する.
    • 観察されたメカニズムは,コバルトセンのシステムとは異なる,段階的なET/PTによるものです.
    • カーボラン核は陽子化に対する安定性を示し,水素進化反応の研究に係る.