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Preparation and Reactions of Sulfides02:26

Preparation and Reactions of Sulfides

4.7K
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
4.7K
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

432
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
432
Electrophilic Aromatic Substitution: Sulfonation of Benzene01:22

Electrophilic Aromatic Substitution: Sulfonation of Benzene

5.9K
Sulfonation of benzene is a reaction wherein benzene is treated with fuming sulfuric acid at room temperature to produce benzenesulfonic acid. Fuming sulfuric acid is a mixture of sulfur trioxide and concentrated sulfuric acid.
5.9K
Structure and Nomenclature of Thiols and Sulfides02:17

Structure and Nomenclature of Thiols and Sulfides

4.6K
Thiols and sulfides are sulfur analogs of alcohols and ethers, respectively, where the sulfur atom takes the place of the oxygen atom. Thus, thiols are generally represented as RSH, where R is an alkyl substituent and —SH is the functional group. On the other hand, in sulfides, the central sulfur atom is bonded to two hydrocarbon groups on either side. Depending upon the type of group, sulfides can be either symmetrical or asymmetrical. Both thiols and sulfides display a bent geometry,...
4.6K
Acid Halides to Carboxylic Acids: Hydrolysis01:01

Acid Halides to Carboxylic Acids: Hydrolysis

2.6K
Hydrolysis of acid halides is a nucleophilic acyl substitution reaction in which acid halides react with water to give carboxylic acids. The reaction occurs readily and does not require acid or a base catalyst.
As shown below, the mechanism involves a nucleophilic attack by water at the carbonyl carbon to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen π bond along with the departure of a halide ion. A final proton transfer step yields carboxylic...
2.6K
Formation of Complex Ions03:45

Formation of Complex Ions

23.5K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.5K

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関連する実験動画

Updated: Jun 12, 2025

Sulfate Separation by Selective Crystallization with a Bis-iminoguanidinium Ligand
08:01

Sulfate Separation by Selective Crystallization with a Bis-iminoguanidinium Ligand

Published on: September 8, 2016

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水中の硫酸を強く選択的に結合する堅固な有機ケージの巧妙なデカグラムスケール合成

Émer M Foyle1, Rosemary J Goodwin1, Cameron J T Cox1,2

  • 1Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia.

Journal of the American Chemical Society
|September 23, 2024
PubMed
まとめ
この要約は機械生成です。

研究者は水中の選択的なアニオン認識のために堅固なヘクサケーションケージを開発しました. 1つのケージは硫酸塩の強い結合と選択性を示し,スケーラブルな宿主合成を示しています.

さらに関連する動画

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
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Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework

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Synthesis of a Water-soluble Metal&#8211;Organic Complex Array
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Synthesis of a Water-soluble Metal–Organic Complex Array

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関連する実験動画

Last Updated: Jun 12, 2025

Sulfate Separation by Selective Crystallization with a Bis-iminoguanidinium Ligand
08:01

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Published on: September 8, 2016

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Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
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Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework

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Synthesis of a Water-soluble Metal&#8211;Organic Complex Array
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Synthesis of a Water-soluble Metal–Organic Complex Array

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科学分野:

  • 超分子化学
  • アニオン認識
  • ホスト・ゲスト・ケミストリー

背景:

  • 水中での選択的アニオン認識は,超分子化学における重要な課題である.
  • 既存のシステムはしばしば水害性アニオンを好み,頑丈さが欠けている.
  • 高い親和性と選択性を持つ水と互換性のある受容体の開発は極めて重要です.

研究 の 目的:

  • アニオン結合のための新鮮で堅固なヘクサカチオンケージを合成する
  • これらのケージの結合親和性と選択性を評価する,特に硫酸性.
  • これらの超分子ホストの 拡張性と実用性を示します

主な方法:

  • 商業的に利用可能な前駆体から3つのヘクサケーションケージ化合物の合成.
  • 大きめのケージ (最大14g) の準備
  • 結合定数 (Ka) と選択性を決定するために,水分および混合溶媒システム (DMSO/バッファ) での結合試験.

主要な成果:

  • 3つの強固なヘクサカチオンケージを 2段階のプロセスで合成しました
  • 1つのケージは水に強い硫酸塩結合を示し,結合定数 (Ka) は12,000M−1であった.
  • DMSO/バッファ混合物における二酸化水素/酸化水素アニオンに対する高選択性.

結論:

  • 大きな3次元超分子ホストは 効率的かつ大規模に合成できます
  • 発達したヘクサカチオンケージは,選択的なアニオン認識の有力な受容体である.
  • これらの発見は,水性環境における挑戦的な認識作業のための機能的な超分子システムの設計を進めている.