Titre :

Intramolecular Repulsion Visible Through the Electrostatic Potential in Disulfides: Analysis via Varying Iso-density Envelopes

Auteur(s) :

Roos, Goedele [Auteur]
Unité de Glycobiologie Structurale et Fonctionnelle (UGSF) - UMR 8576
Murray, Jane S. [Auteur]
Dpt of Chemistry [New Orleans]

Titre de la revue :

Journal of Physical Chemistry A

Nom court de la revue :

J. Phys. Chem. A

Numéro :

127

Éditeur :

American Chemical Society (ACS)

Date de publication :

2023-09-28

ISSN :

1089-5639

Mot(s)-clé(s) en anglais :

Conformation
Disulfides
Electrostatic potential
Hydrogen
Molecular interactions

Discipline(s) HAL :

Sciences du Vivant [q-bio]
Chimie/Chimie théorique et/ou physique

Résumé en anglais : [en]

For a series of diethyl disulfide conformations, the nearly touching contours of the electrostatic potential plotted on iso-density molecular surfaces allow the assessment of intramolecular repulsion. The electrostatic ...
Lire la suite >For a series of diethyl disulfide conformations, the nearly touching contours of the electrostatic potential plotted on iso-density molecular surfaces allow the assessment of intramolecular repulsion. The electrostatic potential is plotted on varying iso-density envelopes to find the nearly touching contours for which (a) the surface electrostatic potential does not show overlap between atoms or functional groups and (b) the typical features are visible (σ-hole, lone pair, hydrogen VS,max). When these nearly touching contours X are closer to the nuclei, the more electron density is excluded from the iso-density envelopes and the smaller are the volumes corresponding to these envelopes. Both the contours X and the corresponding volumes are found to correlate with relative conformational energy, reflecting the degree of intramolecular repulsion present in the various diethyl disulfides. Quantitative estimates of intramolecular repulsion can be made based on relationships between the nearly touching contour X vs relative energy and volume (of the nearly touching contour X) vs relative energy, obtained for series of diethyl disulfide conformers. These relations were used to analyze intramolecular repulsion in a set of disulfides broader than diethyl disulfide conformers. We have shown that the approach of varying electronic density contours can be used in the study of repulsive intramolecular interactions, hereby extending earlier work involving attractive intermolecular interactions.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS

Collections :

• Unité de Glycobiologie Structurale et Fonctionnelle (UGSF) - UMR 8576

Équipe(s) de recherche :

Computational Molecular Systems Biology

Date de dépôt :

2023-09-29T09:09:46Z
2023-10-02T09:30:42Z