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関連する概念動画

Lewis Acids and Bases02:16

Lewis Acids and Bases

17.8K
This lesson delves into Lewis acids and bases in the context of the octet rule for electron-deficient compounds. Here, the concept is discussed, emphasizing the group 13 elements like boron or aluminium. Since group 13 elements possess three valence electrons, they form trivalent compounds with a sextet of electrons and a vacant orbital for the central atom. Consequently, these electron-deficient compounds accept electrons from other species to complete their octet in a chemical reaction. They...
17.8K
Lewis Acids and Bases02:33

Lewis Acids and Bases

48.9K
In 1923, G. N. Lewis proposed a generalized definition of acid-base behavior in which acids and bases are identified by their ability to accept or to donate a pair of electrons and form a coordinate covalent bond.
A coordinate covalent bond (or dative bond) occurs when one of the atoms in the bond provides both bonding electrons. For example, a coordinate covalent bond occurs when a water molecule combines with a hydrogen ion to form a hydronium ion. A coordinate covalent bond also results when...
48.9K
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview01:26

1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview

4.0K
Nitrous acid and nitric acids are two types of acids containing nitrogen, among which nitrous acid is weaker than nitric acid. Nitrous acid with a pKa value of 3.37 ionizes in water to give a nitrite ion and the hydronium ion.
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
4.0K
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism01:37

1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism

5.1K
Nitrous acid is a relatively weak and unstable acid prepared in situ by the reaction of sodium nitrite and cold, dilute hydrochloric acid. In an acidic solution, the nitrous acid undergoes protonation when it loses water to form a nitrosonium ion—an electrophile. Nitrous acid reacts with primary amines to give diazonium salts. The reaction is called diazotization of primary amines.
5.1K
Exceptions to the Octet Rule02:55

Exceptions to the Octet Rule

38.2K
Many covalent molecules have central atoms that do not have eight electrons in their Lewis structures. These molecules fall into three categories:
38.2K
2° Amines to N-Nitrosamines: Reaction with NaNO201:20

2° Amines to N-Nitrosamines: Reaction with NaNO2

5.6K
Secondary amines react with nitrous acid to form N-nitrosamines, as depicted in Figure 1. Nitrous acid, a weak and unstable acid, is formed in situ from an aqueous solution of sodium nitrite and strong acids, such as hydrochloric acid or sulfuric acid, in cold conditions. In the presence of an acid, the nitrous acid gets protonated. The subsequent loss of water results in the formation of the electrophile known as nitrosonium ion.
5.6K

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Characterizing Lewis Pairs Using Titration Coupled with In Situ Infrared Spectroscopy
07:49

Characterizing Lewis Pairs Using Titration Coupled with In Situ Infrared Spectroscopy

Published on: February 20, 2020

10.1K

窒素ルイス酸

Alla Pogoreltsev1, Yuri Tulchinsky1, Natalia Fridman1

  • 1Schulich Faculty of Chemistry, Technion - Israel Institute of Technology , Technion City, Haifa 32000, Israel.

Journal of the American Chemical Society
|February 28, 2017
PubMed
まとめ
この要約は機械生成です。

研究者は,伝統的な化学概念に挑戦する,新しい窒素を中心としたルイス酸を開発しました. これらの新しいルイス酸は 独特のサイクルトリアザンの合成を可能にし,化学研究における新しい道を開きます.

さらに関連する動画

Nitrogen Compound Characterization in Fuels by Multidimensional Gas Chromatography
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Nitrogen Compound Characterization in Fuels by Multidimensional Gas Chromatography

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A Protocol for Safe Lithiation Reactions Using Organolithium Reagents
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A Protocol for Safe Lithiation Reactions Using Organolithium Reagents

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関連する実験動画

Last Updated: Mar 7, 2026

Characterizing Lewis Pairs Using Titration Coupled with In Situ Infrared Spectroscopy
07:49

Characterizing Lewis Pairs Using Titration Coupled with In Situ Infrared Spectroscopy

Published on: February 20, 2020

10.1K
Nitrogen Compound Characterization in Fuels by Multidimensional Gas Chromatography
08:22

Nitrogen Compound Characterization in Fuels by Multidimensional Gas Chromatography

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A Protocol for Safe Lithiation Reactions Using Organolithium Reagents
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A Protocol for Safe Lithiation Reactions Using Organolithium Reagents

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科学分野:

  • 化学について
  • 有機化学
  • 材料科学

背景:

  • ルイス酸は化学合成において極めて重要であり,典型的には窒素以外の元素を中心原子として含んでいる.
  • 窒素は通常,ルイス基として認識され,ルイス酸化学における役割を制限する.

研究 の 目的:

  • 窒素原子を中心とした最初の頑丈で可変ルイス酸を報告した.
  • これらの窒素ルイス酸から派生した新しい化合物の合成と特性を探求する.

主な方法:

  • 窒素を中心としたルイス酸の合成
  • ルイス基で形成されたアダクトの特徴
  • 窒素ルイス酸を用いたサイクルトリアザン製剤
  • 反応性を説明する理論的計算

主要な成果:

  • 窒素の中央原子を持つ最初の安定したルイス酸を示した.
  • 順序的なN-N-Nモチーフを特徴とするサイクルトリアザンを成功裏に製造した.
  • 様々なルイス基を持つ安定した添加物を特徴付けている.
  • 理論的研究により,これらのN-ルイス酸の反応性が解明されました.

結論:

  • 窒素は堅固なルイス酸の中央原子として機能し,ルイス酸化学の範囲を拡大する.
  • 窒素ルイス酸の開発は,循環型トリアザンへの新しい合成経路を提供します.
  • これらの発見は,さまざまな化学領域における窒素ルイス酸の興味深い性質と潜在的な応用を示唆しています.