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2,3,6,7‐Tetramethoxythianthrene Dication: An “Aromatic” π System “Gives Up the Ghost”
Author(s) -
Bock Hans,
Rauschenbach Andreas,
Ruppert Klaus,
Havlas Zdenek
Publication year - 1991
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199107141
Subject(s) - dication , chemistry , organic chemistry , ion
The structure of the dication of tetra‐methoxythianthrene (1) can be described as two nine‐membered cyanine units coupled by CC single bonds. This shows that the tendency for a cyanine‐like structure perturbation is very great, since 1 2⊕ still contains two electrons too many for real cyanine subsystems and could alternatively have exhibited aromatic character as heteroanthracene.