Results 21 to 30 of about 5,247 (193)

Structure of Imidazolium-N-phthalolylglycinate Salt Hydrate: Combined Experimental and Quantum Chemical Calculations Studies

open access: yesCrystals, 2020
An organic supramolecular salt hydrate (imidazolium:N-phthalolylglycinate:H2O; IM+-NPG−-HYD) has been examined for its charge-transfer (CT) characteristics. Accordingly, IM+−NPG−−HYD has been characterized thoroughly using various
Mohammad Usman   +4 more
doaj   +1 more source

The MC-QTAIM: A framework for extending the atoms in molecules analysis beyond purely electronic systems

open access: yes, 2022
The quantum theory of atoms in molecules, QTAIM, is employed to identify AIM and quantify their interactions through the partitioning of molecule into atomic basins in the real space and it is confined only to the purely electronic systems composed of ...
Shahbazian, Shant
core   +1 more source

A quantum-chemical validation about the formation of hydrogen bonds and secondary interactions in intermolecular heterocyclic systems

open access: yesOrbital: The Electronic Journal of Chemistry, 2009
We have performed a detailed theoretical study in order to understand the charge density topology of the C2H4O···C2H2 and C2H4S···C2H2 heterocyclic hydrogen-bonded complexes. Through the calculations derived from
Boaz Galdino Oliveira   +3 more
doaj   +1 more source

High-throughput Quantum Theory of Atoms in Molecules (QTAIM) for Geometric Deep Learning of Molecular and Reaction Properties [PDF]

open access: yes
We present a package, Generator, for geometric molecular property prediction based on topological features of quantum mechanical electron density. Generator computes Quantum Theory of Atoms in Molecules (QTAIM) features, at density functional theory (DFT)
Winston , Gee   +2 more
core   +2 more sources

DFT/QTAIM analysis of favipiravir adsorption on pristine and silicon doped C20 fullerenes

open access: yesMain Group Metal Chemistry, 2019
Fullerenes have received attentions due to their versatile properties. Molecular structures and electronic properties namely binding energy, band gap, electrophilicity index and molecular topological analysis were studied for undoped and silicon doped ...
Alver Özgür   +3 more
doaj   +1 more source

NNAIMQ: A neural network model for predicting QTAIM charges

open access: yesThe Journal of Chemical Physics, 2022
Atomic charges provide crucial information about the electronic structure of a molecular system. Among the different definitions of these descriptors, the one proposed by the Quantum Theory of Atoms in Molecules (QTAIM) is particularly attractive given its invariance against orbital transformations although the computational cost associated with their ...
Miguel Gallegos   +2 more
openaire   +3 more sources

QTAIM-Based Local Potential Energy Model: Applications and Limitations to Quantify the Binding Energy of Intra/intermolecular Interactions

open access: yes, 2020
In previous work, we developed the local potential energy model, LPE, based on the electrostatic force and QTAIM topological data to quantify classical hydrogen bond energies.
CAIO, FIRME
core   +1 more source

The Interaction Strength, Frequency-shifts and Covalence of the C2H4O∙∙∙HOCl and C2H5N∙∙∙HOCl Heterocyclic Complexes

open access: yesOrbital: The Electronic Journal of Chemistry, 2017
A theoretical study of the structural parameters, electronic properties and vibration modes of the C2H4O∙∙∙HOCl and C2H5N∙∙∙HOCl complexes. The great particularity of these complexes is the O–Cl s-hole, which is considered a proton donor center due to ...
Boaz Galdino de Oliveira
doaj   +1 more source

Theoretical study of Fe-based biomimetic complexes interaction with nitrogen and hydrogen: energetics, QTAIM analysis, and the performance of xTB

open access: yesChemical Physics Impact, 2023
Nitrogen and hydrogen binding in three types of Peters systems (borane, alkyl, and silyl) is investigated in this work. Peters systems are studied in the perspective of an environmentally friendly ammonia synthesis alternative to the Haber-Bosch process.
Andrej Hlinčík   +2 more
doaj   +1 more source

Structural, Spectroscopic, and Chemical Bonding Analysis of Zn(II) Complex [Zn(sal)](H2O): Combined Experimental and Theoretical (NBO, QTAIM, and ELF) Investigation

open access: yesCrystals, 2020
The Zn(II) complex of salen-like scaffold [Zn(sal)](H2O) was synthesized and characterized by elemental analysis, IR, UV–Vis, and 1H-NMR spectroscopic techniques. The structure of complex was confirmed by single crystal X-ray diffraction studies.
Mohammad Usman   +7 more
doaj   +1 more source

Home - About - Disclaimer - Privacy