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Radicals, the highly reactive species, gain stability by undergoing three different reactions. The first reaction involves a radical-radical coupling, in which a radical combines with another radical, forming a spin‐paired molecule. The second reaction is between a radical and a spin‐paired molecule, generating a new radical and a new spin‐paired molecule. The third reaction is radical decomposition in a unimolecular reaction, forming a new radical and a spin‐paired...
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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 Kinetics and Combustion Dynamics of I4O9 and Aluminum Mixtures
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Reactivity Dynamics.

Utpal Sarkar1, Pratim Kumar Chattaraj2,3

  • 1Department of Physics, Assam University, Silchar 788011, India.

The Journal of Physical Chemistry. A
|February 10, 2021
PubMed
Summary
This summary is machine-generated.

Chemical reactivity changes dynamically during reactions. This study explores how confinement and electronic excitation affect molecular reactivity using quantum fluid density functional theory, offering insights into reaction direction.

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Area of Science:

  • Quantum Chemistry
  • Theoretical Chemistry
  • Chemical Reactivity

Background:

  • Molecular reactivity is crucial for understanding chemical transformations.
  • Traditional static descriptors may not fully capture dynamic reactivity changes.
  • The influence of external factors like confinement and electronic states on reactivity is complex.

Purpose of the Study:

  • To investigate the dynamic variations of global and local reactivity descriptors.
  • To examine the effects of physical confinement and electronic excitation on chemical reactivity.
  • To provide a framework for predicting the direction of spontaneous chemical reactions.

Main Methods:

  • Utilizing a quantum fluid density functional theory (QFDFT) framework.
  • Analyzing dynamical variants of conceptual density functional theory (DFT) principles.
  • Studying molecular systems under conditions of physical confinement and electronic excitation.

Main Results:

  • Demonstrated that reactivity descriptors vary significantly during physicochemical processes.
  • Showcased the impact of confinement and electronic excitation on molecular reactivity.
  • Highlighted the utility of dynamical DFT in predicting reaction spontaneity.

Conclusions:

  • Dynamic reactivity descriptors offer a more comprehensive understanding of chemical reactions.
  • External factors like confinement and excitation play a significant role in modulating reactivity.
  • Further dynamical studies are essential for a complete reactivity-based analysis of chemical reactions.