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Back Cover: Bowl‐Shaped Pentagon‐ and Heptagon‐Embedded Nanographene Containing a Central Pyrrolo[3,2‐ b ]pyrrole Core (Angew. Chem. Int. Ed. 27/2021)
Author(s) -
Krzeszewski Maciej,
Dobrzycki Łukasz,
Sobolewski Andrzej L.,
Cyrański Michał K.,
Gryko Daniel T.
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202105979
Subject(s) - pyrrole , point reflection , pentagon , planar , crystallography , inversion (geology) , core (optical fiber) , physics , materials science , chemistry , condensed matter physics , geometry , optics , mathematics , geology , computer science , paleontology , computer graphics (images) , organic chemistry , structural basin
A bowl‐shaped nitrogen‐doped nanographene composed of a pyrrolo[3,2‐ b ]pyrrole core substituted with six arene rings circularly bonded with one another undergoes bowl‐to‐bowl inversion with a low barrier. This inversion resembles that of an umbrella flipped by the strong wind. The transition state is not planar, but possesses a rather twisted, S‐shaped conformation with C i symmetry. The bowl‐inversion mechanism follows a quadruple‐well potential model, as reported by Andrzej L. Sobolewski, Michał K. Cyrański, Daniel T. Gryko, and co‐workers in their Research Article on page 14998.