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

26.7K
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.
26.7K
Thermochemical Equations02:55

Thermochemical Equations

28.3K
For a chemical reaction (the system) carried out at constant pressure – with the only work done caused by expansion or contraction – the enthalpy of reaction (also called the heat of reaction, ΔHrxn) is equal to the heat exchanged with the surroundings (qp).
28.3K
Thermal Sigmatropic Reactions: Overview01:16

Thermal Sigmatropic Reactions: Overview

2.1K
Sigmatropic rearrangements are a class of pericyclic reactions in which a σ bond migrates from one part of a π system to another. These are intramolecular rearrangements where the total number of σ and π bonds remain unchanged.
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in...
2.1K
Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

2.3K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.3K
Thermal Electrocyclic Reactions: Stereochemistry01:17

Thermal Electrocyclic Reactions: Stereochemistry

2.0K
The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
2.0K
Chemical Equilibria: Systematic Approach to Equilibrium Calculations01:21

Chemical Equilibria: Systematic Approach to Equilibrium Calculations

643
Equilibrium calculations for systems involving multiple equilibria are often complex. For example, to calculate the solubility of a sparingly soluble salt in an aqueous solution in the presence of a common ion, one must consider all the equilibria in this solution. Calculations for these systems can be complicated and tedious, so a systematic approach with a series of steps is often helpful. The process is detailed below.
The first step is to identify all the chemical reactions involved, The...
643

You might also read

Related Articles

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

Sort by
Same author

Mechanism, Thermochemistry, and Kinetics for the CH + N<sub>2</sub> Reaction Leading to Prompt NO Formation in Combustion.

The journal of physical chemistry. A·2026
Same author

Thermophysical properties of adsorbates with beyond-DFT accuracy from DFT data through error cancellation.

Faraday discussions·2026
Same author

Grand Challenges and Opportunities in Stimulated Dynamic and Resonant Catalysis.

ACS catalysis·2026
Same author

Reducing the Cost of CCSD Basis Set Extrapolation in Ab Initio Computational Thermochemistry.

Journal of chemical theory and computation·2026
Same author

Operando Spectral Imaging of OH A<sup>2</sup>Σ<sup><b>+</b></sup> → X<sup>2</sup>Π 1D Emission in Elevated-Pressure Nitromethane Flames.

The journal of physical chemistry. A·2025
Same author

Real-space Hubbard-corrected density functional theory.

The Journal of chemical physics·2025

Related Experiment Video

Updated: Jun 6, 2025

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
10:52

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics

Published on: April 12, 2019

12.7K

Unifying thermochemistry concepts in computational heterogeneous catalysis.

Bjarne Kreitz1, Gabriel S Gusmão2, Dingqi Nai2

  • 1School of Engineering, Brown University, Providence, Rhode Island 02912, USA. bjarne_kreitz@brown.edu.

Chemical Society Reviews
|November 29, 2024
PubMed
Summary

This study introduces standardized terminology and linear algebra methods to unify thermochemical data from density functional theory (DFT) calculations. This improves consistency and reusability of computational catalysis data for better catalyst design.

More Related Videos

Hot Biological Catalysis: Isothermal Titration Calorimetry to Characterize Enzymatic Reactions
13:00

Hot Biological Catalysis: Isothermal Titration Calorimetry to Characterize Enzymatic Reactions

Published on: April 4, 2014

20.6K
Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
10:39

Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction

Published on: August 23, 2018

7.8K

Related Experiment Videos

Last Updated: Jun 6, 2025

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
10:52

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics

Published on: April 12, 2019

12.7K
Hot Biological Catalysis: Isothermal Titration Calorimetry to Characterize Enzymatic Reactions
13:00

Hot Biological Catalysis: Isothermal Titration Calorimetry to Characterize Enzymatic Reactions

Published on: April 4, 2014

20.6K
Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
10:39

Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction

Published on: August 23, 2018

7.8K

Area of Science:

  • Computational Chemistry
  • Materials Science
  • Chemical Engineering

Background:

  • Thermophysical properties from density functional theory (DFT) are crucial for understanding heterogeneous catalysis.
  • Inconsistent referencing and reporting of DFT-derived enthalpies and free energies hinder reproducibility and data utilization.
  • DFT calculations often contain exchange-correlation errors requiring corrections that are not consistently documented.

Purpose of the Study:

  • To establish consistent terminology and definitions for thermochemical data in computational catalysis.
  • To review and unify existing methods for handling DFT-derived energetic data.
  • To facilitate the correction and alignment of energies across different data sources.

Main Methods:

  • Introduction of a standardized set of terminology and definitions.
  • Review and unification of existing approaches using a linear algebra framework.
  • Development of tools for correcting and aligning energies between diverse data formats.

Main Results:

  • A unified framework for handling thermochemical data from DFT calculations.
  • Facilitation of energy correction and alignment across different data sources.
  • Promotion of sharing and reuse of *ab initio* data in computational catalysis.

Conclusions:

  • Standardization of thermochemistry concepts in computational heterogeneous catalysis enhances fundamental understanding.
  • Reduced computational cost and accelerated design of high-performance catalysts.
  • Improved consistency and reusability of computational data for catalysis research.