Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Catalysis02:50

Catalysis

22.9K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
22.9K
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

2.6K
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...
2.6K
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation02:24

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

6.9K
Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
6.9K
Woodward–Hoffmann Selection Rules and Microscopic Reversibility01:34

Woodward–Hoffmann Selection Rules and Microscopic Reversibility

2.2K
Electrocyclic reactions, cycloadditions, and sigmatropic rearrangements are concerted pericyclic reactions that proceed via a cyclic transition state. These reactions are stereospecific and regioselective. The stereochemistry of the products depends on the symmetry characteristics of the interacting orbitals and the reaction conditions. Accordingly, pericyclic reactions are classified as either symmetry-allowed or symmetry-forbidden. Woodward and Hoffmann presented the selection criteria for...
2.2K
Types of Chemical Reactions: Exchange and Reversible01:08

Types of Chemical Reactions: Exchange and Reversible

8.7K
An exchange reaction is a chemical reaction in which both synthesis and decomposition occur, chemical bonds are both formed and broken, and chemical energy is absorbed, stored, and released.
A special kind of exchange reaction is the oxidation-reduction reaction, or the redox reaction. These reactions involve the transfer of electrons from one compound to another. The electrons in these reactions commonly come from hydrogen atoms, which consist of an electron and a proton. A molecule gives up a...
8.7K
Heterogeneous Catalysis01:22

Heterogeneous Catalysis

141
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...
141

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Inducing configurational stability in inherently flexible expanded heterohelicenes and unlocking stimuli-responsive chiroptical switching.

Chemical science·2026
Same author

Annulated oxazolium salts as anion-π<sup>+</sup> interaction-enabled solid-state room-temperature phosphorescent materials.

Chemical communications (Cambridge, England)·2025
Same author

Catalytic Hydrogenation of CO<sub>2</sub> by Direct Air Capture to Valuable C1 Products Using Homogenous Catalysts.

Chemistry, an Asian journal·2025
Same author

Hydride Transfer-Based CO<sub>2</sub> Reduction Catalysis: Navigating Metal Hydride to Organic Hydride in the Catalytic Loop.

Accounts of chemical research·2024
Same author

Annulated oxazolium anion-π<sup>+</sup> AIEgens.

Chemical communications (Cambridge, England)·2024
Same author

A phosphine-free molecularly-defined Ni(II) complex in catalytic hydrogenation of CO<sub>2</sub>.

Chemical communications (Cambridge, England)·2024

Related Experiment Video

Updated: May 2, 2026

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
10:57

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

17.5K

Switch in Catalyst State: Single Bifunctional Bi-state Catalyst for Two Different Reactions.

Shrivats Semwal1, Joyanta Choudhury1

  • 1Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, 462066, India.

Angewandte Chemie (International Ed. in English)
|April 13, 2017
PubMed
Summary

A novel molecular switch acts as a bi-state catalyst, enabling two distinct reactions like hydrogenation and dehydrogenative coupling. This acid-base responsive system facilitates tandem catalysis by switching between active and inactive states.

Keywords:
hydrogenationiminesligand effectsrutheniumsynthetic methods

More Related Videos

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
09:37

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry

Published on: October 18, 2019

10.0K
Synthesis and Performance Evaluations of ZnCoS/ZnCdS with Twin Crystal Structure for Multifunctional Redox Photocatalysis in Energy Applications
09:22

Synthesis and Performance Evaluations of ZnCoS/ZnCdS with Twin Crystal Structure for Multifunctional Redox Photocatalysis in Energy Applications

Published on: July 25, 2025

962

Related Experiment Videos

Last Updated: May 2, 2026

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
10:57

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

17.5K
Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
09:37

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry

Published on: October 18, 2019

10.0K
Synthesis and Performance Evaluations of ZnCoS/ZnCdS with Twin Crystal Structure for Multifunctional Redox Photocatalysis in Energy Applications
09:22

Synthesis and Performance Evaluations of ZnCoS/ZnCdS with Twin Crystal Structure for Multifunctional Redox Photocatalysis in Energy Applications

Published on: July 25, 2025

962

Area of Science:

  • Catalysis
  • Supramolecular Chemistry
  • Organic Synthesis

Background:

  • Developing molecular systems that can perform multiple distinct chemical transformations is a key challenge in catalysis.
  • Stimuli-responsive catalysts offer precise control over reaction pathways.
  • Tandem catalysis, where multiple reactions occur sequentially in one pot, enhances efficiency and reduces waste.

Purpose of the Study:

  • To design and synthesize a molecular switch capable of catalyzing two different reactions.
  • To demonstrate the switch's ability to operate in a bi-state manner, with complementary activity for each reaction.
  • To implement the molecular switch in an assisted tandem catalysis process.

Main Methods:

  • Design and synthesis of an acid-base responsive molecular switch.
  • Characterization of the switch's catalytic activity in hydrogenation and dehydrogenative coupling reactions.
  • Investigation of the switch's performance in a tandem catalysis setup involving an amine dehydrogenative coupling followed by imine hydrogenation.

Main Results:

  • The molecular switch exhibits distinct catalytic states, showing high activity for one reaction and low activity for the other in a complementary fashion.
  • The system successfully facilitated a tandem process, coupling an amine via dehydrogenation and subsequently hydrogenating the imine product.
  • The bi-state nature of the catalyst was crucial for enabling the sequential reactions through controlled switching.

Conclusions:

  • A novel molecular switch responsive to acid-base stimuli has been developed, acting as a bi-state catalyst.
  • This system enables selective catalysis of two different reactions (hydrogenation and dehydrogenative coupling) in a complementary manner.
  • The demonstrated assisted tandem catalysis highlights the potential of such molecular switches for efficient and controlled multi-step synthesis.