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Related Concept Videos

Predicting Reaction Outcomes02:24

Predicting Reaction Outcomes

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Kinetics describes the rate and path by which a reaction occurs. In contrast, thermodynamics deals with state functions and describes the properties, behavior, and components of a system. It is not concerned with the path taken by the process and cannot address the rate at which a reaction occurs. Although it does provide information about what can happen during a reaction process, it does not describe the detailed steps of what appears on an atomic or a molecular level. On the other hand,...
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Reaction Mechanisms03:06

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Chemical reactions often occur in a stepwise fashion, involving two or more distinct reactions taking place in a sequence. A balanced equation indicates the reacting species and the product species, but it reveals no details about how the reaction occurs at the molecular level. The reaction mechanism (or reaction path) provides details regarding the precise, step-by-step process by which a reaction occurs.
For instance, the decomposition of ozone appears to follow a mechanism with two steps:
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Multi-Step Reactions02:31

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Chemical reactions often occur in a stepwise fashion involving two or more distinct reactions taking place in a sequence. A balanced equation indicates the reacting species and the product species, but it reveals no details about how the reaction occurs at the molecular level. The reaction mechanism (or reaction path) provides details regarding the precise, step-by-step process by which a reaction occurs. Each of the steps in a reaction mechanism is called an elementary reaction. These...
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Chemical Reactions01:19

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A chemical reaction is a process by which the bonds in the atoms of substances are rearranged to generate new substances. Matter cannot be created or destroyed in a chemical reaction—the same type and number of atoms that make up the reactants are still present in the products. Merely, the rearrangement of chemical bonds produces new compounds.
Chemical Reactions Rearrange Atoms into New Substances
A chemical reaction takes starting materials—the reactants—and changes them...
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Chemical Reactions02:26

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A balanced chemical equation provides the information of chemical formulas of the reactants and products involved in the chemical change. A reaction’s stoichiometry helps predict how much of the reactant is needed to produce the desired amount of product, or in some cases, how much product will be formed from a specific amount of the reactant.
The relative amounts of reactants and products represented in a balanced chemical equation are often referred to as stoichiometric amounts.
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Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

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Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
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Updated: Oct 24, 2025

Optimization of the Ugi Reaction Using Parallel Synthesis and Automated Liquid Handling
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AutoMeKin2021: An open-source program for automated reaction discovery.

Emilio Martínez-Núñez1, George L Barnes2, David R Glowacki3

  • 1Department of Physical Chemistry, University of Santiago de Compostela, Santiago de Compostela, Spain.

Journal of Computational Chemistry
|August 13, 2021
PubMed
Summary
This summary is machine-generated.

AutoMeKin2021 enhances automated reaction mechanism discovery with new features like rare-event molecular dynamics and bond-order analysis. This updated software aids in exploring chemical reaction networks and van der Waals complexes.

Keywords:
MD simulationsgraph theorykineticsreaction mechanisms

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Area of Science:

  • Computational Chemistry
  • Chemical Kinetics

Background:

  • Automated reaction mechanism discovery is crucial for understanding chemical processes.
  • Existing tools like tsscds2018 have limitations in exploring complex reaction pathways.

Purpose of the Study:

  • To introduce AutoMeKin2021, an advanced software for automated reaction mechanism discovery.
  • To incorporate novel algorithms and simulation techniques for enhanced chemical exploration.

Main Methods:

  • Utilizing rare-event molecular dynamics simulations to identify challenging reaction pathways.
  • Implementing a new search algorithm based on bond-order time series analysis.
  • Extending the search algorithm to investigate van der Waals complexes and incorporating chemical knowledge.

Main Results:

  • AutoMeKin2021 offers enhanced capabilities for discovering reaction mechanisms.
  • The software includes statistical analysis of chemical reaction networks.
  • A web application is provided for user-friendly job submission.

Conclusions:

  • AutoMeKin2021 represents a significant advancement in automated chemical reaction mechanism discovery.
  • The new features facilitate a more comprehensive study of chemical systems.
  • The software is publicly available with comprehensive documentation and support.