Results 1 to 10 of about 5,423 (180)

High-throughput quantum theory of atoms in molecules (QTAIM) for geometric deep learning of molecular and reaction properties [PDF]

open access: diamondDigital Discovery
QTAIM coupled to graph neural networks can improve model performance and generalizability.
Santiago Vargas   +2 more
exaly   +7 more sources

Physical Nature of Interactions in ZnIIComplexes with 2,2′-Bipyridyl: Quantum Theory of Atoms in Molecules (QTAIM), Interacting Quantum Atoms (IQA), Noncovalent Interactions (NCI), and Extended Transition State Coupled with Natural Orbitals for Chemical Valence (ETS-NOCV) Comparative Studies [PDF]

open access: greenThe Journal of Physical Chemistry A, 2013
In the present account factors determining the stability of ZnL, ZnL2, and ZnL3 complexes (L = bpy, 2,2′-bipyridyl) were characterized on the basis of various techniques: the quantum theory of atoms in molecules (QTAIM), energy decomposition schemes based on interacting quantum atoms (IQA), and extended transition state coupled with natural orbitals ...
Ignacy Cukrowski   +2 more
openalex   +5 more sources

Lewis Acid Properties of Tetrel Tetrafluorides—The Coincidence of the σ-Hole Concept with the QTAIM Approach [PDF]

open access: yesCrystals, 2017
Tetrel bond is analysed for a series of ZF4 (Z = C, Si, Ge) complexes with one and two NH3 or AsH3 ligands. The MP2/aug-cc-pVTZ calculations were performed and supported by results of the Quantum Theory of “Atoms in Molecules” (QTAIM) and the Natural ...
Sławomir J. Grabowski
doaj   +6 more sources

Application of the quantum theory of atoms in molecules (QTAIM) to the study of the enzymatic kinetic resolution of propranolol, an amino alcohol with pharmaceutical applications

open access: goldAnais do VIII Simpósio de Estrutura Eletrônica e Dinâmica Molecular, 2020
Propranolol, ((R,S)-1-iso-propylamino-3-(1-naphthoxy)-2-propanol), is a β-adrenergic antagonist and is commercially available as a racemic mixture. Only the S-enantiomer has the desired therapeutic effect. Therefore, many researchers have been working on strategies to obtain S-propranolol with high enantiomeric purity.
David A. Rincón   +2 more
openalex   +2 more sources

Interacting Quantum Atoms Analysis of Covalent and Collective Interactions in Single Elongated Carbon–Carbon Bonds [PDF]

open access: yesMolecules
Chemical bonds among carbon atoms are central to chemistry. A general working principle regarding these interactions is that these contacts become stronger as the carbon atoms become closer to each other. Nevertheless, there are long, yet strong single C–
Antonio Bonesana-Espinoza   +4 more
doaj   +2 more sources

Interplay between N∙∙∙H, N∙∙∙X and π∙∙∙X interactions in the complex pairing of pyrazine with hypohalous acids: A NBO and QTAIM (quantum theory of atoms in molecules) analysis

open access: diamondBulletin of the Chemical Society of Ethiopia, 2017
The theoretical calculations of the complexes formed by pyrazine (PZ) with hypohalous acids (HOX; X= F, Cl, Br and I) have been carried out at the MP2/6-311++G(2d,2p) computational level. PZ and HOX molecules could have three different types of interactions including hydrogen bond (N∙∙∙H) and halogen bonds (N∙∙∙X, p∙∙∙X). The nature of halogen atom has
Abedien Zabardasti   +2 more
openalex   +4 more sources

Understanding the structure and hydrogen bonding network of (H2O)32and (H2O)33: an improved Monte Carlo temperature basin paving (MCTBP) method and quantum theory of atoms in molecules (QTAIM) analysis

open access: goldRSC Advances, 2017
Large water clusters are of particular interest because of their connection to liquid water and the intricate hydrogen bonding networks they possess.
Avijit Rakshit   +3 more
openalex   +3 more sources

Aromaticity balance, π-electron cooperativity and H-bonding properties in tautomerism of salicylideneaniline: the quantum theory of atoms in molecules (QTAIM) approach

open access: closedJournal of Molecular Modeling, 2010
Topological analysis based on DFT calculations regarding proton transfer reaction in salicylideneaniline (SA) was performed to scrutinize possible changes in the intramolecular H-bond, π-electron delocalization and aromaticity levels of certain fragments.
Hasan Karabıyık   +3 more
openalex   +5 more sources

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