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DensToolKit2: A comprehensive open-source package for analyzing the electron density and its derivative scalar and

J M Solano-Altamirano1, Julio M Hernández-Pérez1, J Sandoval-Lira2

  • 1Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, 14 sur y Av. San Claudio, C.P. 72570 Puebla, Pue., Mexico.

The Journal of Chemical Physics
|December 16, 2024
PubMed
Summary

DensToolKit-v2 is a software suite for analyzing molecular electron density (ρ) and derived properties. It now estimates pKa/pKb values for acids and amines using molecular electrostatic potential, enhancing chemical analysis capabilities.

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Area of Science:

  • Computational Chemistry
  • Quantum Chemistry
  • Chemical Physics

Background:

  • Accurate analysis of molecular electron density (ρ) is crucial for understanding chemical phenomena.
  • Existing computational tools may lack comprehensive analysis of derived fields and indices.
  • Predicting acid-base properties (pKa/pKb) from first principles remains a challenge.

Purpose of the Study:

  • To introduce DensToolKit-v2, an enhanced software suite for molecular electron density analysis.
  • To expand the suite's capabilities to include novel indices, fields, and predictive tools.
  • To provide a user-friendly interface and efficient computational methods.

Main Methods:

  • Development of cross-platform, optionally parallelized programs for analyzing molecular electron density (ρ).
  • Implementation of routines for Non-Covalent Interaction index, Density Overlap Regions Index, and spin density calculations.
  • Inclusion of programs for analyzing Density Matrix of order 1, two-electron pair density, and momentum-space functionals.
  • Integration of a novel sub-program for computing integrated properties of analyzed fields.
  • Development of a graphical user interface for visualizing ρ critical points topology.
  • Implementation of a program for estimating pKa/pKb values using molecular electrostatic potential and experimental data correlations.

Main Results:

  • DensToolKit-v2 offers a comprehensive suite for analyzing molecular electron density and related fields.
  • New capabilities include Non-Covalent Interaction index, spin density, and momentum-space functionals.
  • The suite now provides estimations for pKa of carboxylic acids and pKb of amines.
  • A user-friendly GUI simplifies the visualization of electron density topology.
  • The software is optimized for speed and includes workflow examples.

Conclusions:

  • DensToolKit-v2 significantly advances computational tools for molecular electron density analysis.
  • The new predictive capabilities for pKa/pKb offer valuable insights into acid-base chemistry.
  • The suite's comprehensive features and user-friendly design facilitate broader application in chemical research.
  • Open-source release under GPLv3 promotes accessibility and collaborative development.