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Anthracene‐Attached Persistent Tricyclic Aromatic Hydrocarbon Radicals
Author(s) -
Nishiuchi Tomohiko,
Ito Ryuoh,
Takada Aya,
Yasuda Yuri,
Nagata Takaya,
Stratmann Erik,
Kubo Takashi
Publication year - 2019
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201801806
Subject(s) - anthracene , chemistry , radical , aromaticity , reactivity (psychology) , substituent , moiety , polycyclic aromatic hydrocarbon , hydrocarbon , tricyclic , aromatic hydrocarbon , unpaired electron , photochemistry , pyrene , organic chemistry , molecule , medicine , alternative medicine , pathology
Anthracene‐attached tricyclic aromatic hydrocarbon radicals having different central polygons, Ant‐5 , Ant‐6 , and Ant‐7 , were synthesized to evaluate the role of an anthracene substituent group in the stability and reactivity of tricyclic aromatic hydrocarbon radicals. The bulky anthryl group effectively protects a carbon atom with high spin density, resulting in high persistence of the radicals. On the other hand, the combination of the anthryl group and the tricyclic aromatic scaffold makes the molecular structure drastically change from a twisted form to a folded form and an unpaired electron moves into the anthryl moiety, eventually affording a tail‐to‐tail σ‐dimer.