Interacting quantum atoms—a review

JM Guevara-Vela, E Francisco, T Rocha-Rinza… - Molecules, 2020 - mdpi.com
The aim of this review is threefold. On the one hand, we intend it to serve as a gentle
introduction to the Interacting Quantum Atoms (IQA) methodology for those unfamiliar with it …

Contributions of IQA electron correlation in understanding the chemical bond and non-covalent interactions

AF Silva, LJ Duarte, PLA Popelier - Structural Chemistry, 2020 - Springer
The quantum topological energy partitioning method Interacting Quantum Atoms (IQA) has
been applied for over a decade resulting in an enlightening analysis of a variety of systems …

Non-covalent interactions from a Quantum Chemical Topology perspective

PLA Popelier - Journal of molecular modeling, 2022 - Springer
About half a century after its little-known beginnings, the quantum topological approach
called QTAIM has grown into a widespread, but still not mainstream, methodology of …

Fluorine gauche effect explained by electrostatic polarization instead of hyperconjugation: An interacting quantum atoms (IQA) and relative energy gradient (REG) …

JCR Thacker, PLA Popelier - The Journal of Physical Chemistry A, 2018 - ACS Publications
We present an interacting quantum atoms (IQA) study of the gauche effect by comparing 1, 2-
difluoroethane, 1, 2-dichloroethane, and three conformers of 1, 2, 3, 4, 5, 6 …

The ANANKE relative energy gradient (REG) method to automate IQA analysis over configurational change

JCR Thacker, PLA Popelier - Theoretical Chemistry Accounts, 2017 - Springer
Much chemical insight ultimately comes down to finding out which fragment of a total system
behaves like the total system, in terms of an energy profile. A simple example is that of the …

Interacting Quantum Atoms and Multipolar Electrostatic Study of XH··· π Interactions

L Triestram, F Falcioni, PLA Popelier - ACS omega, 2023 - ACS Publications
The interaction energies of nine XH··· π (X= C, N, and O) benzene-containing van der Waals
complexes were analyzed, at the atomic and fragment levels, using QTAIM multipolar …

Quantifying electron correlation of the chemical bond

JL McDonagh, AF Silva, MA Vincent… - The Journal of …, 2017 - ACS Publications
The Interacting Quantum Atoms (IQA) method is used to analyze the correlated part of the
Møller–Plesset (MP) perturbation theory two-particle density matrix. Such an analysis …

Using the Relative Energy Gradient Method with Interacting Quantum Atoms to Determine the Reaction Mechanism and Catalytic Effects in the Peptide Hydrolysis in …

JCR Thacker, MA Vincent… - Chemistry–A European …, 2018 - Wiley Online Library
The reaction mechanism in an active site is of the utmost importance when trying to
understand the role that an enzyme plays in biological processes. In a recently published …

Machine learning of dynamic electron correlation energies from topological atoms

JL McDonagh, AF Silva, MA Vincent… - Journal of chemical …, 2017 - ACS Publications
We present an innovative method for predicting the dynamic electron correlation energy of
an atom or a bond in a molecule utilizing topological atoms. Our approach uses the machine …

Efficient implementation of the interacting quantum atoms energy partition of the second‐order Møller–Plesset energy

JL Casals‐Sainz, JM Guevara‐Vela… - Journal of …, 2020 - Wiley Online Library
We describe an efficient implementation of the partition of the second‐order Møller–Plesset
(MP2) correlation energy within the interacting quantum atoms (IQA) energy decomposition …