scholarly journals Probing non-covalent interactions with a second generation energy decomposition analysis using absolutely localized molecular orbitals

2016 ◽  
Vol 18 (33) ◽  
pp. 23067-23079 ◽  
Author(s):  
Paul R. Horn ◽  
Yuezhi Mao ◽  
Martin Head-Gordon
Keyword(s):  
Second Generation ◽  
Decomposition Analysis ◽  
Molecular Orbitals ◽  
Energy Decomposition Analysis ◽  
Analysis Method ◽  
Energy Decomposition ◽  
Localized Molecular Orbitals ◽  
Non Covalent Interactions ◽  
Covalent Interactions

Second generation of variational energy decomposition analysis method based on absolutely localized molecular orbitals.

scholarly journals Energy Decomposition Analysis Method for Metallic Systems

2021 ◽  
Author(s):  
Han Chen ◽  
Chris-Kriton Skylaris
Keyword(s):  
Decomposition Analysis ◽  
Molecular Orbitals ◽  
Energy Decomposition Analysis ◽  
Analysis Method ◽  
Energy Decomposition ◽  
Localized Molecular Orbitals ◽  
Metallic Systems

In this work, we present the first extension of an energy decomposition analysis (EDA) method to metallic systems. We extend the theory of our Hybrid Absolutely Localized Molecular Orbitals (HALMO)...

scholarly journals Probing radical–molecule interactions with a second generation energy decomposition analysis of DFT calculations using absolutely localized molecular orbitals

2020 ◽  
Vol 22 (23) ◽  
pp. 12867-12885
Author(s):  
Yuezhi Mao ◽  
Daniel S. Levine ◽  
Matthias Loipersberger ◽  
Paul R. Horn ◽  
Martin Head-Gordon
Keyword(s):  
Dft Calculations ◽  
Second Generation ◽  
Decomposition Analysis ◽  
Closed Shell ◽  
Energy Decomposition Analysis ◽  
Proper Treatment ◽  
Energy Decomposition ◽  
Localized Molecular Orbitals ◽  
Intermolecular Complexes ◽  
Molecule Interactions

Proper treatment of intermolecular complexes formed by radicals and closed-shell molecules in energy decomposition analysis of DFT calculations.

Vapour Pressure Isotope Effect on Evaporation from Pure Organic Phases - a PIMD Approach

2020 ◽  
Author(s):  
Luis Vasquez ◽  
Agnieszka Dybala-Defratyka
Keyword(s):  
Path Integral ◽  
Vapour Pressure ◽  
Density Functional ◽  
Isotope Effects ◽  
Tight Binding ◽  
Decomposition Analysis ◽  
Energy Decomposition Analysis ◽  
Special Importance ◽  
Non Covalent Interactions ◽  
Covalent Interactions

<p></p><p>Very often in order to understand physical and chemical processes taking place among several phases fractionation of naturally abundant isotopes is monitored. Its measurement can be accompanied by theoretical determination to provide a more insightful interpretation of observed phenomena. Predictions are challenging due to the complexity of the effects involved in fractionation such as solvent effects and non-covalent interactions governing the behavior of the system which results in the necessity of using large models of those systems. This is sometimes a bottleneck and limits the theoretical description to only a few methods.<br> In this work vapour pressure isotope effects on evaporation from various organic solvents (ethanol, bromobenzene, dibromomethane, and trichloromethane) in the pure phase are estimated by combining force field or self-consistent charge density-functional tight-binding (SCC-DFTB) atomistic simulations with path integral principle. Furthermore, the recently developed Suzuki-Chin path integral is tested. In general, isotope effects are predicted qualitatively for most of the cases, however, the distinction between position-specific isotope effects observed for ethanol was only reproduced by SCC-DFTB, which indicates the importance of using non-harmonic bond approximations.<br> Energy decomposition analysis performed using the symmetry-adapted perturbation theory (SAPT) revealed sometimes quite substantial differences in interaction energy depending on whether the studied system was treated classically or quantum mechanically. Those observed differences might be the source of different magnitudes of isotope effects predicted using these two different levels of theory which is of special importance for the systems governed by non-covalent interactions.</p><br><p></p>

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