Is there a future for topological analysis in experimental charge-density research?

Area of Science:

• Theoretical Chemistry
• Quantum Chemistry
• Materials Science

Background:

• Topological analysis, particularly Bader's Atoms in Molecules (AIM) theory, is a cornerstone in theoretical chemistry.
• AIM has been widely applied in both theoretical calculations and experimental charge density research.
• Early applications successfully established AIM as a tool for characterizing intramolecular chemical bonding.

Purpose of the Study:

• To provide an overview of the historical development and applications of topological analysis in chemistry.
• To critically assess the limitations and scope of AIM theory, especially concerning predictive capabilities.
• To offer recommendations for the future direction of topological analysis research.

Main Methods:

• Review of early developments in topological analysis.
• Discussion of subsequent studies and their methodologies.
• Critical evaluation of the predictive power of topological analysis for chemical bonding and interactions.

Main Results:

• Topological analysis has a strong track record in describing intramolecular bonding.
• Many later studies lacked predictive power, focusing on descriptive rather than quantitative insights.
• AIM theory has significant limitations in accurately estimating intermolecular interaction energies.

Conclusions:

• The application of topological analysis should shift from well-understood bonding to focus on novel or unusual bonding situations.
• Future descriptive studies on intermolecular interactions require a clear and defined research focus.
• Researchers should prioritize predictive applications of topological analysis over purely descriptive ones.