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Related Concept Videos

Preparation and Reactions of Sulfides02:26

Preparation and Reactions of Sulfides

4.9K
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.
4.9K
Preparation and Reactions of Thiols02:33

Preparation and Reactions of Thiols

6.3K
Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.
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Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene01:13

Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene

6.1K
Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen.
6.1K
Structure and Nomenclature of Thiols and Sulfides02:17

Structure and Nomenclature of Thiols and Sulfides

4.8K
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,...
4.8K
Characteristics and Nomenclature of Homopolymers01:00

Characteristics and Nomenclature of Homopolymers

3.1K
Polymers that are made up of identical monomer units are called homopolymers. Only one repeating unit is involved in the construction of the homopolymer structure. For example, as depicted in Figure 1, polypropylene is a homopolymer constituted of propylene monomers. Here, the only repeating unit in the polymer chain is propylene.
3.1K
Polymer Classification: Stereospecificity01:26

Polymer Classification: Stereospecificity

2.5K
Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
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Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
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Functional Polythioamides Derived from Thiocarbonyl Fluoride.

Haonan Xiang1, Jieping Wang1, Zihao Guo1

  • 1School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.

Angewandte Chemie (International Ed. in English)
|September 25, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces a novel method for synthesizing advanced polythioamides using thiocarbonyl fluoride, enabling the creation of previously inaccessible polymer structures for metal ion binding and catalysis.

Keywords:
Fluoride ExchangeNanoparticlesPolythioamidesSulfur-Containing PolymersThiocarbonyl Fluoride

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Organic Synthesis

Background:

  • Polythioamides are sulfur-containing polymers with unique functionalities.
  • Traditional synthesis methods using elemental sulfur are limited by substrate reactivity, especially with unsaturated functional groups.

Purpose of the Study:

  • To develop a versatile and pioneering approach for synthesizing well-defined polythioamides.
  • To expand the scope of accessible substrates for polythioamide synthesis, including unsaturated ones.
  • To explore the applications of these novel polythioamides in metal ion binding and catalysis.

Main Methods:

  • Utilized a sulfur-fluoride exchange (SuFEx) inspired polymerization strategy.
  • Employed diboronic acids, secondary diamines, and thiocarbonyl fluoride as key building blocks.
  • Synthesized polythioamides with well-defined structures, including those with unsaturated backbones.

Main Results:

  • Successfully synthesized novel polythioamides from previously inaccessible unsaturated substrates.
  • Demonstrated efficient and selective binding of the synthesized polythioamides to metal ions.
  • Applied these polymers in precious metal recovery and developed Pd(II)-crosslinked single-chain nanoparticles as recyclable catalysts.

Conclusions:

  • Thiocarbonyl fluoride serves as a potent and versatile hub for intricate sulfur-containing polymer synthesis.
  • The newly devised polythioamides exhibit significant potential in metal ion chelation, precious metal recovery, and catalysis.
  • This approach opens new avenues for designing advanced functional sulfur-containing polymers.