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Reactivity and selectivity of bowl-shaped polycyclic aromatic hydrocarbons: Relationship to C60

The Diels-Alder reactivity of different bowl-shaped polycyclic aromatic hydrocarbons (namely, corannulene, cyclopentacorannulene, diindenochrysene, hemifullerene, and circumtrindene) has been explored computationally within the DFT framework. To this end, both the increase in reactivity with the size of the buckybowl and complete [6,6]-regioselectivity in the process have been analyzed in detail by using the activation strain model of reactivity in combination with the energy decomposition analysis method. These results have been compared with the parent C60 fullerene, which also produces the corresponding [6,6]-cycloadduct exclusively. The behavior of the buckybowls considered herein resembles, in general, that of C60. Whereas the interaction energy between the deformed reactants along the reaction coordinate mainly controls the regioselectivity of the process, it is the interplay between the activation strain energy and the transition-state interaction that governs the reactivity of the system. Bigger bowls, better reactivity: Starting from corannulene, there is a smooth convergence to the C60 energy barrier and reaction energy for the Diels-Alder reaction with cyclopentadiene when the size of the buckybowl is increased (see figure). Through density functional calculations, the origins of both this trend of reactivity and the observed exclusive [6,6]-regioselectivity are analyzed in detail

We are grateful for financial support from the Spanish MINECO-FEDER (grants CTQ2013-44303-P and CTQ2014-51912-REDC to I.F. and CTQ2014-54306-P to M.S.), Fundaciûn BBVA (Convocatoria 2015 de Ayudas Fundaciûn BBVA a Investigadores y Creadores Culturales), Catalan DIUE (projects 2014SGR931 and XRQTC to M.S.), the National Research School Combination—Catalysis (NRSC-C), and The Netherlands Organization for Scientific Research (NWO/ALW, NWO/CW, NWO/EW). Support for the research of M.S. was received through the ICREA Academia 2014 prize of the Catalan DIUE. The FEDER grant UNGI10-4E-801 (European Fund for Regional Development) also funded this research. Y.G.-R. acknowledges the MINECO for a FPI grant

© Chemistry - A European Journal, 2016, vol. 22, núm. 4, p. 1368-1378

Wiley

Author: García-Rodeja, Yago
Solà i Puig, Miquel
Bickelhaupt, Friedrich Matthias
Fernández, Israel
Date: 2016 January 22
Abstract: The Diels-Alder reactivity of different bowl-shaped polycyclic aromatic hydrocarbons (namely, corannulene, cyclopentacorannulene, diindenochrysene, hemifullerene, and circumtrindene) has been explored computationally within the DFT framework. To this end, both the increase in reactivity with the size of the buckybowl and complete [6,6]-regioselectivity in the process have been analyzed in detail by using the activation strain model of reactivity in combination with the energy decomposition analysis method. These results have been compared with the parent C60 fullerene, which also produces the corresponding [6,6]-cycloadduct exclusively. The behavior of the buckybowls considered herein resembles, in general, that of C60. Whereas the interaction energy between the deformed reactants along the reaction coordinate mainly controls the regioselectivity of the process, it is the interplay between the activation strain energy and the transition-state interaction that governs the reactivity of the system. Bigger bowls, better reactivity: Starting from corannulene, there is a smooth convergence to the C60 energy barrier and reaction energy for the Diels-Alder reaction with cyclopentadiene when the size of the buckybowl is increased (see figure). Through density functional calculations, the origins of both this trend of reactivity and the observed exclusive [6,6]-regioselectivity are analyzed in detail
We are grateful for financial support from the Spanish MINECO-FEDER (grants CTQ2013-44303-P and CTQ2014-51912-REDC to I.F. and CTQ2014-54306-P to M.S.), Fundaciûn BBVA (Convocatoria 2015 de Ayudas Fundaciûn BBVA a Investigadores y Creadores Culturales), Catalan DIUE (projects 2014SGR931 and XRQTC to M.S.), the National Research School Combination—Catalysis (NRSC-C), and The Netherlands Organization for Scientific Research (NWO/ALW, NWO/CW, NWO/EW). Support for the research of M.S. was received through the ICREA Academia 2014 prize of the Catalan DIUE. The FEDER grant UNGI10-4E-801 (European Fund for Regional Development) also funded this research. Y.G.-R. acknowledges the MINECO for a FPI grant
Format: application/pdf
ISSN: 0947-6539 (versió paper)
1521-3765 (versió electrònica)
Document access: http://hdl.handle.net/10256/12373
Language: eng
Publisher: Wiley
Collection: MINECO/PE 2015-2017/CTQ2014-54306-P
AGAUR/2014-2016/2014 SGR-931
Versió postprint del document publicat a: http://dx.doi.org/10.1002/chem.201502248
Articles publicats (D-Q)
Is part of: © Chemistry - A European Journal, 2016, vol. 22, núm. 4, p. 1368-1378
Rights: Tots els drets reservats
Subject: Reaccions químiques
Chemical reactions
Funcional de densitat, Teoria del
Density functionals
Fullerenes
Ful·lerens
Hidrocarburs aromàtics policíclics
Polycyclic aromatic hydrocarbons
Diels-Alder, Reacció de
Diels-Alder reaction
Title: Reactivity and selectivity of bowl-shaped polycyclic aromatic hydrocarbons: Relationship to C60
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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