Controlled Generation of 9-Boratriptycene by Lewis Adduct Dissociation: Accessing a Non‐Planar Triarylborane

Aurélien Chardon; Arnaud Osi; Damien Mahaut; Thu Hong Doan; Nikolay Tumanov; Johan Wouters; Luca Fusaro; Benoît Champagne; Guillaume Berionni

doi:10.1002/ange.202003119

Controlled Generation of 9-Boratriptycene by Lewis Adduct Dissociation: Accessing a Non‐Planar Triarylborane

Aurélien Chardon, Arnaud Osi, Damien Mahaut, Thu Hong Doan, Nikolay Tumanov, Johan Wouters, Luca Fusaro, Benoît Champagne, Guillaume Berionni

Résultats de recherche: Contribution à un journal/une revue › Article › Revue par des pairs

Résumé

A highly bent triarylborane, 9-boratriptycene, was generated in solution by selective protodeboronation of the corresponding tetra-aryl boron ate complex with the strong Brønsted acid HNTf₂. The iptycene core confers enhanced Lewis acidity to 9-boratriptycene, making it unique in terms of structure and reactivity. We studied the stereoelectronic properties of 9-boratriptycene by quantifying its association with small N- and O-centered Lewis bases, as well as with sterically hindered phosphines. The resultant Lewis adducts exhibited unique structural, spectroscopic, and photophysical properties. Beyond the high pyramidalization of the 9-boratriptycene scaffold and its low reorganization energy upon Lewis base coordination, quantum chemical calculations revealed that the absence of π donation from the triptycene aryl rings to the boron vacant p_z orbital is one of the main reasons for its high Lewis acidity.

langue originale	Anglais
Numéro d'article	10.1002/ange.202003119
Pages (de - à)	12502-12506
Nombre de pages	5
journal	Angewandte Chemie
Volume	132
Numéro de publication	30
Les DOIs	https://doi.org/10.1002/ange.202003119
Etat de la publication	Publié - 20 juil. 2020

Financement

We acknowledge the University of Namur, the Namur Institute of Structured Matter (NISM), and the Fond National de la Recherche Scientifique (FNRS grant F.4513.18 for GB and FRIA PhD grants for A.O. and D.M.) for financial support. We thank the PC 2 technological platform for access to characterization instruments. The calculations were performed on the computers of the Consortium des Équipements de Calcul Intensif and particularly those of the High‐Performance Computing Platform, which are supported by the FNRS‐FRFC, the Walloon Region, and the University of Namur (Conventions No. GEQ U.G006.15, U.G018.19, 1610468, and RW/GEQ2016). We acknowledge Prof. H. Mayr and Dr. A. R. Ofial (LMU University, Munich), Dr. S. Lakhdar (Paul Sabatier University, Toulouse), Prof. A. Krief, and Dr. N. Tumanova for helpful discussions, and Lei Hu for the sample of 9‐phosphatriptycene.

Accès au document

10.1002/ange.202003119

Autres fichiers et liens

Link to publication in Scopus

Document sous embargo

Accepted Manuscript Author Version
Accepted author manuscript, 781 KB
Demander une copie

HydrogenActive: Hydrogénation d’alcènes non-activés, d’amides et du dioxyde de carbone par des catalyseurs de type paires de Lewis frustrées
Mahaut, D. (Responsable du Projet), Berionni, G. (Promoteur) & CHAMPAGNE, B. (Co-Promoteur)
1/10/19 → 1/10/23
Projet: Projet de thèse
CÉCI – Consortium des Équipements de Calcul Intensif
CHAMPAGNE, B. (Responsable du Projet), Lazzaroni, R. (Responsable du Projet), Geuzaine , C. (Co-investigateur), Chatelain, P. (Co-investigateur) & Knaepen, B. (Co-investigateur)
1/01/18 → 31/12/22
Projet: Recherche

Physico-chimie et caractérisation (PC2)
Wouters, J. (!!Manager), Aprile, C. (!!Manager) & Fusaro, L. (!!Manager)
Plateforme technologique Caracterisation physico-chimiques
Equipement/installations: Plateforme technolgique
Plateforme Technologique Calcul Intensif
Champagne, B. (!!Manager)
Plateforme technologique Calcul intensif
Equipement/installations: Plateforme technolgique

Synthesis of sterically hindered phosphatriptycenes and computational investigation of their properties in the context of frustrated lewis pair chemistry
Mahaut, D. (Auteur), Berionni, G. (Promoteur) & Champagne, B. (Copromoteur), 1 févr. 2019
Student thesis: Master types › Master en sciences chimique à finalité approfondie

Fichier

Contient cette citation

@article{7828db42c0714de6969e796ca9a0a157,

title = "Controlled Generation of 9-Boratriptycene by Lewis Adduct Dissociation: Accessing a Non‐Planar Triarylborane",

abstract = "A highly bent triarylborane, 9-boratriptycene, was generated in solution by selective protodeboronation of the corresponding tetra-aryl boron ate complex with the strong Br{\o}nsted acid HNTf2. The iptycene core confers enhanced Lewis acidity to 9-boratriptycene, making it unique in terms of structure and reactivity. We studied the stereoelectronic properties of 9-boratriptycene by quantifying its association with small N- and O-centered Lewis bases, as well as with sterically hindered phosphines. The resultant Lewis adducts exhibited unique structural, spectroscopic, and photophysical properties. Beyond the high pyramidalization of the 9-boratriptycene scaffold and its low reorganization energy upon Lewis base coordination, quantum chemical calculations revealed that the absence of π donation from the triptycene aryl rings to the boron vacant pz orbital is one of the main reasons for its high Lewis acidity.",

keywords = "Lewis adducts, non-planar boron Lewis acids, triarylborane, triptycene",

author = "Aur{\'e}lien Chardon and Arnaud Osi and Damien Mahaut and Doan, {Thu Hong} and Nikolay Tumanov and Johan Wouters and Luca Fusaro and Beno{\^i}t Champagne and Guillaume Berionni",

year = "2020",

month = jul,

day = "20",

doi = "10.1002/ange.202003119",

language = "English",

volume = "132",

pages = "12502--12506",

journal = "Angewandte Chemie",

issn = "0044-8249",

publisher = "John Wiley and Sons Ltd",

number = "30",

}

TY - JOUR

T1 - Controlled Generation of 9-Boratriptycene by Lewis Adduct Dissociation

T2 - Accessing a Non‐Planar Triarylborane

AU - Chardon, Aurélien

AU - Osi, Arnaud

AU - Mahaut, Damien

AU - Doan, Thu Hong

AU - Tumanov, Nikolay

AU - Wouters, Johan

AU - Fusaro, Luca

AU - Champagne, Benoît

AU - Berionni, Guillaume

PY - 2020/7/20

Y1 - 2020/7/20

N2 - A highly bent triarylborane, 9-boratriptycene, was generated in solution by selective protodeboronation of the corresponding tetra-aryl boron ate complex with the strong Brønsted acid HNTf2. The iptycene core confers enhanced Lewis acidity to 9-boratriptycene, making it unique in terms of structure and reactivity. We studied the stereoelectronic properties of 9-boratriptycene by quantifying its association with small N- and O-centered Lewis bases, as well as with sterically hindered phosphines. The resultant Lewis adducts exhibited unique structural, spectroscopic, and photophysical properties. Beyond the high pyramidalization of the 9-boratriptycene scaffold and its low reorganization energy upon Lewis base coordination, quantum chemical calculations revealed that the absence of π donation from the triptycene aryl rings to the boron vacant pz orbital is one of the main reasons for its high Lewis acidity.

AB - A highly bent triarylborane, 9-boratriptycene, was generated in solution by selective protodeboronation of the corresponding tetra-aryl boron ate complex with the strong Brønsted acid HNTf2. The iptycene core confers enhanced Lewis acidity to 9-boratriptycene, making it unique in terms of structure and reactivity. We studied the stereoelectronic properties of 9-boratriptycene by quantifying its association with small N- and O-centered Lewis bases, as well as with sterically hindered phosphines. The resultant Lewis adducts exhibited unique structural, spectroscopic, and photophysical properties. Beyond the high pyramidalization of the 9-boratriptycene scaffold and its low reorganization energy upon Lewis base coordination, quantum chemical calculations revealed that the absence of π donation from the triptycene aryl rings to the boron vacant pz orbital is one of the main reasons for its high Lewis acidity.

KW - Lewis adducts

KW - non-planar boron Lewis acids

KW - triarylborane

KW - triptycene

UR - http://www.scopus.com/inward/record.url?scp=85087924669&partnerID=8YFLogxK

U2 - 10.1002/ange.202003119

DO - 10.1002/ange.202003119

M3 - Article

SN - 0044-8249

VL - 132

SP - 12502

EP - 12506

JO - Angewandte Chemie

JF - Angewandte Chemie

IS - 30

M1 - 10.1002/ange.202003119

ER -

Controlled Generation of 9-Boratriptycene by Lewis Adduct Dissociation: Accessing a Non‐Planar Triarylborane

Résumé

Financement

Accès au document

Autres fichiers et liens

Document sous embargo

Empreinte digitale

Projets

HydrogenActive: Hydrogénation d’alcènes non-activés, d’amides et du dioxyde de carbone par des catalyseurs de type paires de Lewis frustrées

CÉCI – Consortium des Équipements de Calcul Intensif

Équipement

Physico-chimie et caractérisation (PC2)

Plateforme Technologique Calcul Intensif

Thèses de l'étudiant

Synthesis of sterically hindered phosphatriptycenes and computational investigation of their properties in the context of frustrated lewis pair chemistry

Contient cette citation