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2° Amines to N-Nitrosamines: Reaction with NaNO201:20

2° Amines to N-Nitrosamines: Reaction with NaNO2

4.0K
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.
4.0K
Nitrosation of Enols01:19

Nitrosation of Enols

2.5K
The nitrosation reaction is one of the methods of preparing 1,2-diketones. The enol tautomer of the starting ketone reacts with sodium nitrite in hydrochloric acid, generating the 1,2-diketone after hydrolysis.
2.5K
Preparation of Nitriles01:12

Preparation of Nitriles

2.0K
One of the common methods to prepare nitriles is the dehydration of amides. This method requires strong dehydrating agents like phosphorous pentoxide or boiling acetic anhydride for converting amides to nitriles. Another reagent namely, thionyl chloride also accomplishes the dehydration of amides, where amide acts as a nucleophile. The first step of the mechanism involves the nucleophilic attack by the amide on the thionyl chloride to form an intermediate. In the next step, the electron pairs...
2.0K
Colors and Magnetism03:02

Colors and Magnetism

11.5K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
11.5K
Lewis Structures of Molecular Compounds and Polyatomic Ions02:54

Lewis Structures of Molecular Compounds and Polyatomic Ions

34.4K
To draw Lewis structures for complicated molecules and molecular ions, it is helpful to follow a step-by-step procedure as outlined:
34.4K
Precipitation Reactions03:10

Precipitation Reactions

50.0K
In a precipitation reaction, aqueous solutions of soluble salts react to give an insoluble ionic compound – the precipitate. The reaction occurs when oppositely charged ions in solution overcome their attraction for water and bind to each other, forming a precipitate that separates out from the solution. Since such reactions involve the exchange of ions between ionic compounds in aqueous solution, they are also referred to as double displacement, double replacement, exchange reactions, or...
50.0K

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Determining the Mechanical Strength of Ultra-Fine-Grained Metals
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Determining the Mechanical Strength of Ultra-Fine-Grained Metals

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オープンシェルのFeIV ニトリド

Jeewhan Oh1, Shao-Liang Zheng1, Kurtis M Carsch1

  • 1Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States.

Journal of the American Chemical Society
|January 20, 2025
PubMed
まとめ
この要約は機械生成です。

研究者は新しい鉄ニトリド化合物を 三重基底状態で作りました この独特の鉄複合体は前例のない反応性を示し,C-HアミネーションとC-C結合の分裂を含んでいます.

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Measuring Nitrite and Nitrate, Metabolites in the Nitric Oxide Pathway, in Biological Materials using the Chemiluminescence Method
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Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
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Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry

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科学分野:

  • 無機化学
  • 有機金属化学
  • 光触媒

背景:

  • 終端鉄ニトリド複合体は,窒素固定と触媒サイクルにおける重要な中間物質である.
  • 鉄ニトリド種の電子構造を理解することは,その反応性を制御する鍵です.
  • 以前の研究は,低スピンの鉄ナトリド類に焦点を当て,観察された反応モードを制限しました.

研究 の 目的:

  • 新しい開いた殻の 終末鉄ナトリド複合体を 発光し特徴づけること
  • 合成された鉄ニトリドの電子基質状態と構造特性を解明する.
  • この鉄ナトリド種の反応性を,特に低スピンの類型と比較して調べる.

主な方法:

  • ステリカルに重荷を負ったディピリンリガンドを用いた鉄ニトリド複合体の合成と特徴付け.
  • 固体構造分析とゼロフィールド57Feモースバウアー光学
  • 電子基底状態と結合特性を決定する計算分析.

主要な成果:

  • 開いた殻の末端の鉄ナトリド複合体 (EmL) Fe ((N) の写真生成と特徴づけに成功した.
  • 構造データ,モースバウアー光譜,そして計算から得られた証拠は 三重電子基底状態を示している.
  • 鉄ニトリド複合体は弱体化されたFe-N多重結合特性を示し,新しい反応性を可能にします.

結論:

  • 三重基底状態の鉄ニトリド複合体は,低スピンの類型には見られないユニークな反応性を表しています.
  • これには,原始C ((sp3) -Hアミネーション,H2割れ,芳香C-C割れ,光触媒N原子移転が含まれます.
  • この研究は,鉄ニトリド化合物の既知の反応性を拡張し,触媒の新たな道を開きます.