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Updated: Mar 29, 2026
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Published on: June 6, 2025
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Information-Theoretic Perspectives on Chemical Problems: Recent Developments and Applications
Arpita Poddar1, Pratim Kumar Chattaraj2
1Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
Entropy (Basel, Switzerland)
|March 28, 2026
Summary
The information-theoretic approach (ITA) offers a powerful, orbital-free method to analyze molecular properties using electron density. This framework provides transparent insights into chemical stability, bonding, and reactivity.
Area of Science:
- Quantum Chemistry
- Theoretical Chemistry
- Computational Chemistry
Background:
- Density Functional Theory (DFT) is a cornerstone of modern computational chemistry.
- Traditional interpretations often rely on orbital-based methods, which can be complex.
- Electron density provides a fundamental, physically transparent description of a chemical system.
Purpose of the Study:
- To review the theoretical underpinnings of the Information-Theoretic Approach (ITA).
- To highlight the chemical significance and applications of Information-Theoretic (IT) descriptors.
- To showcase ITA as a powerful density-based, orbital-free interpretation framework.
Main Methods:
- Utilizing electron density as a probability distribution.
- Developing and applying Information-Theoretic (IT) descriptors.
- Analyzing molecular structure, stability, and reactivity.
Main Results:
- IT descriptors offer physically transparent measures of electron delocalization, localization, and reorganization.
- ITA successfully rationalizes molecular stability, bonding, and reactivity trends.
- IT descriptors complement conceptual DFT quantities in reactivity studies.
Conclusions:
- The Information-Theoretic Approach (ITA) provides a versatile and predictive framework for chemical analysis.
- IT descriptors enable a unified, orbital-free understanding of chemical behavior.
- This approach has significant potential to advance chemical interpretation and discovery.
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