Determination of the absolute solvation free energy and enthalpy of the proton in solutions

A Malloum, JJ Fifen, J Conradie - Journal of Molecular Liquids, 2021 - Elsevier
The absolute solvation energies (free energy and enthalpy) of the proton in solution is of
great importance for biological and chemical processes in that solution. The absolute …

On the Accuracy of the Direct Method to Calculate pKa from Electronic Structure Calculations

FR Dutra, CS Silva, R Custodio - The Journal of Physical …, 2020 - ACS Publications
The direct method (HA (soln)⇌ A (soln)–+ H (soln)+) for calculating p K a of monoprotic acids
is as efficient as thermodynamic cycles. A selective adjustment of proton free energy in …

Hydrogen bond networks of ammonia clusters: What we know and what we don't know

A Malloum, J Conradie - Journal of Molecular Liquids, 2021 - Elsevier
Understanding the behaviour of liquid ammonia is subjected to understanding the hydrogen
bond networks in ammonia clusters as well as their interactions. In comparison to water …

How to Predict the pKa of Any Compound in Any Solvent

M Busch, E Ahlberg, E Ahlberg, K Laasonen - ACS omega, 2022 - ACS Publications
Acid–base properties of molecules in nonaqueous solvents are of critical importance for
almost all areas of chemistry. Despite this very high relevance, our knowledge is still mostly …

Structures, relative stability and binding energies of neutral water clusters,(H 2 O) 2–30

A Malloum, JJ Fifen, Z Dhaouadi, SGN Engo… - New Journal of …, 2019 - pubs.rsc.org
We have revised the structures of neutral water clusters,(H2O) n= 2–30, with the affordable
M06-2X functional, presenting up to 25 isomers for each cluster size. Besides, relative …

Structures of water clusters in the solvent phase and relative stability compared to gas phase

A Malloum, J Conradie - Polyhedron, 2021 - Elsevier
Most of biological and chemical processes occur in aqueous solution. To consider this
solvent effects, theoretical investigations including explicit water molecules forming clusters …

Exploration of the potential energy surfaces of small ethanol clusters

A Malloum, JJ Fifen, J Conradie - Physical Chemistry Chemical …, 2020 - pubs.rsc.org
The potential energy surfaces (PESs) of the ethanol clusters become increasingly complex
as the cluster size increases. This is mainly due to the fact that there are up to three stable …

Binding energies and isomer distribution of neutral acetonitrile clusters

A Malloum, JJ Fifen, J Conradie - International Journal of …, 2020 - Wiley Online Library
Structures and relative stabilities of neutral acetonitrile clusters up to decamer have been
investigated. We used the ABCluster code to thoroughly explore the potential energy …

Theoretical study of the Cu2+-glycine interaction in ammonia and temperature effects

TE Da-yang, A Malloum, JJ Fifen, M Nsangou… - Journal of Molecular …, 2024 - Elsevier
In this study, we have investigated the potential energy of surfaces of the various glycine
tautomers, also the interaction between Cu 2+ cation with these glycine tautomers in both …

Solvation free energy of the proton in acetonitrile

A Malloum, J Conradie - Journal of Molecular Liquids, 2021 - Elsevier
Solvation free energy of the proton in solution is used to describe proton transfer processes
in that solution. In addition, the solvation free energy of the proton is involved in several …