Does the occurrence of resonance (by the delocalization of radical/cationic/anionic charges) induce the existence of intramolecular halogen-halogen contacts?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388963%3A_____%2F16%3A00463399" target="_blank" >RIV/61388963:_____/16:00463399 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1039/c6ra14270b" target="_blank" >http://dx.doi.org/10.1039/c6ra14270b</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c6ra14270b" target="_blank" >10.1039/c6ra14270b</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Does the occurrence of resonance (by the delocalization of radical/cationic/anionic charges) induce the existence of intramolecular halogen-halogen contacts?

Popis výsledku v původním jazyce

Exotic intramolecular homo/hetero dihalogen bonding (C-X center dot center dot center dot X-C: X = Br, Cl and F) in radical, cationic and anionic five-membered ring systems was analyzed using wave functional theory (MP2/aug-cc-pVTZ) analysis. The six types (Br-Br, Cl-Cl, F-F, Br-Cl, Cl-F and Br-F) of C-X center dot center dot center dot X-C interactions, stabilized by resonance, were created using delocalized radical/cationic/anionic carbon atoms in corresponding five-membered ring structures. The above interactions fall under the group of 'resonance assisted noncovalent interactions', where the impact of resonance is to induce the existence of intramolecular dihalogen bonding, even without electrostatic interaction. Further, the paper focuses on NCI bond length and stability, as these can be tuned through substitution effects. 3D-NCI plots and the presence of Bond Critical Points (BCP) clearly confirm the existence of dihalogen bonding. Natural bond orbital (NBO) analysis reveals that the dihalogen bonding in radical/cationic/anionic systems lacks charge transfer and orbital overlapping through non-interacting lobes. Specifically, sigma- and pi-holes exist not only for the electron depleted regions (positive regions) but also for the electron enriched regions (negative regions). The sigma- and pi-holes were not utilized for the C-X center dot center dot center dot X-C interactions because the interactions considered were not assisted by electrostatic interactions; instead, they were only assisted by resonance. Overall, this study clearly reveals that the impact of resonance formation (by delocalization of radical, cation, and anion charges) enhances the chance of occurrence of intramolecular halogen-halogen contacts.

Název v anglickém jazyce

Does the occurrence of resonance (by the delocalization of radical/cationic/anionic charges) induce the existence of intramolecular halogen-halogen contacts?

Popis výsledku anglicky

Exotic intramolecular homo/hetero dihalogen bonding (C-X center dot center dot center dot X-C: X = Br, Cl and F) in radical, cationic and anionic five-membered ring systems was analyzed using wave functional theory (MP2/aug-cc-pVTZ) analysis. The six types (Br-Br, Cl-Cl, F-F, Br-Cl, Cl-F and Br-F) of C-X center dot center dot center dot X-C interactions, stabilized by resonance, were created using delocalized radical/cationic/anionic carbon atoms in corresponding five-membered ring structures. The above interactions fall under the group of 'resonance assisted noncovalent interactions', where the impact of resonance is to induce the existence of intramolecular dihalogen bonding, even without electrostatic interaction. Further, the paper focuses on NCI bond length and stability, as these can be tuned through substitution effects. 3D-NCI plots and the presence of Bond Critical Points (BCP) clearly confirm the existence of dihalogen bonding. Natural bond orbital (NBO) analysis reveals that the dihalogen bonding in radical/cationic/anionic systems lacks charge transfer and orbital overlapping through non-interacting lobes. Specifically, sigma- and pi-holes exist not only for the electron depleted regions (positive regions) but also for the electron enriched regions (negative regions). The sigma- and pi-holes were not utilized for the C-X center dot center dot center dot X-C interactions because the interactions considered were not assisted by electrostatic interactions; instead, they were only assisted by resonance. Overall, this study clearly reveals that the impact of resonance formation (by delocalization of radical, cation, and anion charges) enhances the chance of occurrence of intramolecular halogen-halogen contacts.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

—

Projekt

<a href="/cs/project/GBP208%2F12%2FG016" target="_blank" >GBP208/12/G016: Řízení struktury a funkce biomolekul na molekulové úrovni: souhra teorie a experimentu</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

RSC Advances

ISSN

2046-2069

e-ISSN

—

Svazek periodika

6

Číslo periodika v rámci svazku

71

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

66870-66878

Kód UT WoS článku

000380353600060

EID výsledku v databázi Scopus

2-s2.0-84979519281