Premium
Front Cover: Dithieno[ a , e ]pentalenes: Highly Antiaromatic Yet Stable π‐Electron Systems without Bulky Substituents (Chem. Eur. J. 5/2021)
Author(s) -
Usuba Junichi,
Hayakawa Masahiro,
Yamaguchi Shigehiro,
Fukazawa Aiko
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202004896
Subject(s) - antiaromaticity , pentalene , thiophene , moiety , conjugated system , chemistry , benzene , aromaticity , anthracene , electron , ring (chemistry) , character (mathematics) , cyclobutadiene , annulation , azulene , photochemistry , crystallography , stereochemistry , molecule , physics , organic chemistry , polymer , quantum mechanics , geometry , mathematics , catalysis
Dancing people parade along the rings : The cover image depicts the movement of electrons on tetracyclic π‐conjugated systems under a magnetic field. While the annulation of benzene rings with a pentalene moiety resulted in the local aromatic character in the six‐membered rings, the thiophene‐fused analog retains the pronounced antiaromatic character of pentalene moiety. The fused thiophene rings also offer sufficient stability to the antiaromatic pentalene even without bulky substituents, enabling the formation of aggregates. More information can be found in the Full Paper by A. Fukazawa et al. on page 1638.