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Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
Halogenation of Alkenes02:46

Halogenation of Alkenes

Halogenation is the addition of chlorine or bromine across the double bond in an alkene to yield a vicinal dihalide. The reaction occurs in the presence of inert and non-nucleophilic solvents, such as methylene chloride, chloroform, or carbon tetrachloride.
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Electrophilic Aromatic Substitution: Chlorination and Bromination of Benzene01:15

Electrophilic Aromatic Substitution: Chlorination and Bromination of Benzene

Chlorination and bromination are important classes of electrophilic aromatic substitutions, where benzene reacts with chlorine or bromine in the presence of a Lewis acid catalyst to give halogenated substitution products. A Lewis acid such as aluminium chloride or ferric chloride catalyzes the chlorination, and ferric bromide catalyzes the bromination reactions. During the bromination of alkenes, bromine polarizes and becomes electrophilic. However, in the bromination of benzene, the bromine...
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Metal-Ligand Bonds02:51

Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)
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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)

Published on: December 29, 2016

Chalcogen···π Bonding Catalysis: Concept, Reaction Development and Emerging Opportunities.

Haofu Zhu1, Hang Zhou1, Yao Wang1

  • 1School of Chemistry and Chemical Engineering, Shandong University, Jinan, P. R. China.

Chemistry, an Asian Journal
|June 10, 2026
PubMed
Summary
This summary is machine-generated.

Chalcogen···π (Ch···π) interactions, once overlooked, are now a powerful catalytic platform for π-systems. This review explores their use in achieving previously unattainable chemical transformations.

Keywords:
catalyst designchalcogen···π interactionsnoncovalent interactionsorganocatalysisσ‐hole

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Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
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Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions

Published on: July 30, 2017

Area of Science:

  • Chemistry
  • Organic Chemistry
  • Catalysis

Background:

  • Noncovalent interactions activating π-systems were historically disfavored.
  • Recent research highlights chalcogen···π (Ch···π) interactions as a robust catalytic approach.
  • Ch···π interactions enable diverse transformations of π-systems.

Purpose of the Study:

  • To review the emerging field of chalcogen···π interactions in catalysis.
  • To discuss catalyst design, mechanistic insights, and strategies.
  • To highlight the unique capabilities of Ch···π interactions.

Main Methods:

  • Review of recent literature on Ch···π interactions.
  • Analysis of catalyst design principles.
  • Discussion of mechanistic pathways.
  • Categorization of catalytic strategies.

Main Results:

  • Ch···π interactions offer a reliable platform for catalyzing reactions involving π-systems.
  • These interactions enable reactions not achievable through other methods.
  • Both pure and cooperative Ch···π interactions are effective.

Conclusions:

  • Chalcogen···π interactions represent a significant advancement in catalysis.
  • This approach provides novel strategies for chemical synthesis.
  • Further exploration of Ch···π interactions is warranted.