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Hetero Analogs of Sesquifulvalene
Author(s) -
Seitz G.
Publication year - 1969
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.196904781
Subject(s) - acetic anhydride , sulfur , oxygen , chemistry , condensation , oxygen atom , nitrogen , nitrogen atom , resonance (particle physics) , organic chemistry , polymer chemistry , molecule , catalysis , ring (chemistry) , thermodynamics , physics , particle physics
Heterosesquifulvalenes containing sulfur or oxygen as hetero atom may be prepared, e.g., by condensation of cyclopentadienes with thiopyrones or pyrones in acetic anhydride. Heterosesquifulvalenes containing nitrogen can be obtained from the oxygen compounds by O,N‐exchange. The ground state of all these compounds is determined mainly by the nonpolar resonance formula.