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関連する概念動画

Redox Reactions01:24

Redox Reactions

Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
Electron Transport Chains01:28

Electron Transport Chains

The final stage of cellular respiration is oxidative phosphorylation that consists of two steps: the electron transport chain and chemiosmosis. The electron transport chain is a set of proteins found in the inner mitochondrial membrane in eukaryotic cells. Its primary function is to establish a proton gradient that can be used during chemiosmosis to produce ATP and generate electron carriers, such as NAD+ and FAD, that are used in glycolysis and the citric acid cycle.
The ETC is comprised of...
Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

Oxidation–Reduction Reactions
Oxidation Numbers03:14

Oxidation Numbers

In redox reactions, the transfer of electrons occurs between reacting species. Electron transfer is described by a hypothetical number called the oxidation number (or oxidation state). It represents the effective charge of an atom or element, which is assigned using a set of rules.
Oxidation of Phenols to Quinones01:17

Oxidation of Phenols to Quinones

In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox property is crucial in...
Redox Reactions01:27

Redox Reactions

Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...

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関連する実験動画

Updated: Jul 9, 2026

CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light
07:08

CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light

Published on: June 12, 2019

オスミウム四酸化物によるアルカンの酸化.

Brian C Bales1, Peter Brown, Ahmad Dehestani

  • 1University of Washington, Department of Chemistry, Box 351700, Seattle, Washington 98195-1700, USA.

Journal of the American Chemical Society
|March 3, 2005
PubMed
まとめ
この要約は機械生成です。

水性アルカリ性オスミウム四酸化物 (OsO4) は,飽和アルケンを85°Cで酸化し,イソブタンをテルトブタノールに変換する. このリガンド加速度触媒は,アルカンの機能化のための新しい経路を提供します.

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関連する実験動画

Last Updated: Jul 9, 2026

CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light
07:08

CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light

Published on: June 12, 2019

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
10:42

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Published on: March 22, 2019

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

科学分野:

  • 無機化学 無機化学とは
  • 有機化学 オーガニック・ケミストリー
  • カタリシス カタリシス カタリシス

背景:

  • アルカンのC-H結合の酸化は,その惰性性により困難です.
  • オスミウム四酸化物 (OsO4) は強力な酸化物質であり,一般的にアルケンの二酸化水酸化に使用されます.

研究 の 目的:

  • 水性アルカリ OsO4.4を用いて飽和アルケンの酸化を調査する.
  • この新しいアルカンの酸化反応のメカニズムと範囲を探求する.

主な方法:

  • 様々なアルカン (イソブタン,サイクロヘキサン,エタン,プロパン) が85°Cの水性アルカリ溶液中のOsO4と反応する.
  • ナトリウムペリオデート (NaIO4) を,触媒回転の末端酸化剤として使用する.

主要な成果:

  • イソブタンは定量的に酸化され,テルトブタノールとなった.
  • サイクロヘキサンはアディパートとサクシネートを生成した.
  • エタンとプロパンは酸化してアセテートになりました.
  • リガンド加速度触媒が観察され,ヒドロキシドがOsO4に結合することを要求した.

結論:

  • 水性アルカリのOsO4は,アルケンのC-H結合を第一,二次,三次的に効果的に酸化する.
  • [3+2]サイクロアディションを含む協調メカニズムが提案されており,アルケンの二酸化水素化に類似しています.
  • この研究は,アルカンの機能化のための新しい触媒方法を示しています.