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Cover Feature: Thermodynamically Stable o ‐Quinodimethane: Synthesis, Structure, and Reactivity (Chem. Eur. J. 11/2021)
Author(s) -
Adachi Kazuhiko,
Hirose Shunsuke,
Ueda Yasuyuki,
Uekusa Hidehiro,
Hamura Toshiyuki
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202005270
Subject(s) - ring (chemistry) , cover (algebra) , benzene , reactivity (psychology) , chemistry , ring strain , energy balance , work (physics) , physics , organic chemistry , thermodynamics , engineering , mechanical engineering , medicine , alternative medicine , pathology
Thermal ring‐opening of cyclobutaphenanthrenes into thermodynamically stable o ‐quinodimethanes is reported in this work. In the cover artwork, the balance of the Lady Justice indicates that energy difference between the energy loss due to dearomatization of the benzene ring in cyclobutaphenanthrene and the strain energy of the four‐membered ring is decisive for ring‐opening. The o ‐quinodimethanes obtained through this strategy can be used as a reactive platform to access novel polycyclic aromatic compounds. More information can be found in the Communication by T. Hamura et al. on page 3665.