Results 41 to 50 of about 11,742,928 (131)

Conceptual DFT-Based Computational Peptidology of Marine Natural Compounds: Discodermins A–H

open access: yesMolecules, 2020
A methodology based on the concepts that arise from Density Functional Theory named Conceptual Density Functional Theory (CDFT) was chosen for the calculation of some global and local reactivity descriptors of the Discodermins A–H family of marine ...
Norma Flores-Holguín   +2 more
doaj   +1 more source

Understanding the high reactivity of carbonyl compounds towards nucleophilic carbenoid intermediates generated from carbene isocyanides [PDF]

open access: yesRSC Advances, 2015
The high reactivity of carbonyl compounds towards the carbenoid intermediate cis-IN, generated in situ by the addition of methyl isocyanide to dimethyl acetylenedicarboxylate (DMAD), has been investigated at the MPWB1K/6-311G(d,p) computational level by ...
Mar Ríos-Gutiérrez   +2 more
doaj   +1 more source

Existence and convergence results for the Galerkin approximation of an electronic density functional [PDF]

open access: yes, 2010
We formulate and analyze a model for the study of finite clusters of atoms or localized defects in infinite crystals based on orbital-free density functional theory.
CHRISTOPH ORTNER   +8 more
core   +1 more source

Chemical reactivity and bioactivity properties of the Phallotoxin family of fungal peptides based on Conceptual Peptidology and DFT study

open access: yesHeliyon, 2019
A methodology based on the concepts that arise from Density Functional Theory (CDFT) was chosen for the calculation of the global and local reactivity descriptors of the Phallotoxin family of fungal peptides. The determination of the active sites for the
Norma Flores-Holguín   +2 more
doaj   +1 more source

On the question of the transformation of amino acids into aldimine N-oxides (nitrones): molecular electron density theory (MEDT) considerations

open access: yesMonatshefte für Chemie - Chemical Monthly
Abstract The molecular mechanism of the oxidation process of imine derivatives of amino acids by peracids was explored on the basis of the ωB97X-D/6-311G(d,p) (PCM) quantum chemical computations. Analysis in the framework of the conceptual density functional theory (CDFT) presents that in these lowly polar ...
Mikołaj Sadowski   +2 more
openaire   +1 more source

Reconciling Experiment with Quantum Chemical Calculations: Electron Iso-Density Surfaces Represent Atomic and Molecular Surfaces [PDF]

open access: yes
The surface area of atoms and molecules plays a crucial role in shaping many physiochemical properties of materials. Despite its fundamental importance, precisely defining atomic and molecular surfaces has long been a puzzle.
Amin, Alibakhshi, Lars V., Schäfer
core   +1 more source

Stereoselective Synthesis of a Novel Series of Dispiro-oxindolopyrrolizidines Embodying Thiazolo[3,2-a]benzimidazole Motif: A Molecular Electron Density Theory Study of the Mechanism of the [3 + 2] Cycloaddition Reaction

open access: yesChemistry, 2023
A one-pot multi-component reaction was employed for the stereoselective synthesis of a novel set of dispiro-oxindolopyrrolizidines analogs incorporating a thiazolo[3,2-a]benzimidazole scaffold based on the [3 + 2] cycloaddition (32CA) reaction approach ...
Assem Barakat   +5 more
doaj   +1 more source

Materials properties from electron density distributions: Molecular magnetism and linear optical properties [PDF]

open access: yes, 2016
The general goal of this thesis is correlating observable properties of organic and metal-organic materials with their ground-state electron density distribution. In a long-term view, we expect to develop empirical or semi-empirical approaches to predict
Rezende dos Santos, Leonardo Humberto
core   +2 more sources

A Molecular Electron Density Theory Study of the Chemoselectivity, Regioselectivity, and Diastereofacial Selectivity in the Synthesis of an Anticancer Spiroisoxazoline derived from α-Santonin

open access: yesMolecules, 2019
The [3 + 2] cycloaddition (32CA) reaction of an α-santonin derivative, which has an exocyclic C⁻C double bond, with p-bromophenyl nitrile oxide yielding only one spiroisoxazoline, has been studied within the molecular electron density theory ...
Luis R. Domingo   +2 more
doaj   +1 more source

A Molecular Electron Density Theory Study of the Reactivity of Azomethine Imine in [3+2] Cycloaddition Reactions

open access: yes, 2017
The electronic structure and the participation of the simplest azomethine imine (AI) in [3+2] cycloaddition (32CA) reactions have been analysed within the Molecular Electron Density Theory (MEDT) using Density Functional Theory (DFT) calculations at the ...
Luis R. Domingo, Mar Ríos-Gutiérrez
core   +2 more sources

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