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Related Concept Videos

Heterogeneous Catalysis01:22

Heterogeneous Catalysis

112
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
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Regioselectivity of Electrophilic Additions-Peroxide Effect02:35

Regioselectivity of Electrophilic Additions-Peroxide Effect

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In the presence of organic peroxides, the addition of hydrogen bromide to an alkene yields the isomer that is not predicted by Markovnikov’s rule. For example, the addition of hydrogen bromide to 2-methylpropene in the presence of peroxides gives 1-bromo-2-methylpropane. This addition reaction proceeds via a free radical mechanism, which reverses the regioselectivity. The free radical reaction mechanism involves three stages: initiation, propagation, and termination.
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Introduction to Mechanisms of Enzyme Catalysis01:13

Introduction to Mechanisms of Enzyme Catalysis

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For many years, scientists thought that enzyme-substrate binding took place in a simple "lock-and-key" fashion. This model stated that the enzyme and substrate fit together perfectly in one instantaneous step. However, current research supports a more refined view scientists call induced fit. The induced-fit model expands upon the lock-and-key model by describing a more dynamic interaction between enzyme and substrate. As the enzyme and substrate come together, their interaction causes...
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Introduction to Mechanisms of Enzyme Catalysis01:13

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Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

4.0K
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...
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Catalytically Perfect Enzymes01:07

Catalytically Perfect Enzymes

5.5K
The theory of catalytically perfect enzymes was first proposed by W.J. Albery and J. R. Knowles in 1976. These enzymes catalyze biochemical reactions at high-speed. Their catalytic efficiency values range from 108-109 M-1s-1. These enzymes are also called 'diffusion-controlled' as the only rate-limiting step in the catalysis is that of the substrate diffusion into the active site. Examples include triose phosphate isomerase, fumarase, and superoxide dismutase.
 
Most enzymes...
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Related Experiment Video

Updated: Apr 8, 2026

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs
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Enantioselective cooperative catalysis.

Suleman M Inamdar1, Valmik S Shinde, Nitin T Patil

  • 1Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune 411 008, India. n.patil@ncl.res.in.

Organic & Biomolecular Chemistry
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Summary
This summary is machine-generated.

Enantioselective cooperative catalysis uses two catalysts simultaneously for unique product formation. This review highlights mechanistic insights into these powerful reactions.

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Area of Science:

  • Organic Chemistry
  • Catalysis
  • Asymmetric Synthesis

Background:

  • Enantioselective catalysis is crucial for synthesizing chiral molecules.
  • Cooperative catalysis, using multiple catalysts, offers enhanced reactivity and selectivity.
  • Simultaneous dual-catalyst systems are a rapidly developing area in synthetic chemistry.

Purpose of the Study:

  • To review the emerging field of enantioselective cooperative catalysis.
  • To emphasize the mechanistic aspects of these reactions.
  • To elucidate the distinct roles of each catalyst in dual-catalyst systems.

Main Methods:

  • Literature review of recent advancements in enantioselective cooperative catalysis.
  • Analysis of mechanistic studies focusing on catalyst synergy.
  • Discussion of reaction pathways and intermediate species.

Main Results:

  • Identification of key strategies for designing effective dual-catalyst systems.
  • Explanation of how catalyst cooperation leads to unique selectivities and reactivities.
  • Highlighting successful applications in complex molecule synthesis.

Conclusions:

  • Enantioselective cooperative catalysis provides access to novel chemical transformations.
  • Understanding reaction mechanisms is vital for optimizing catalyst performance.
  • This approach holds significant promise for future synthetic endeavors.