Tetrakisdehydro[18]annuleno[20]annulene |
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| Authors: | Yukihiro Yoshikawa Masahiko Iyoda Masazumi Nakagawa |
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| Affiliation: | Department of Chemistry, Faculty of Science, Osaka University, Toyonaka, Osaka 560, Japan |
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| Abstract: | Tetrakisdehydro[18]annuleno[20]annulene has been synthesized. The 1H NMR spectra clearly indicate the induction of dia- and paramagnetic ring currents in 18- and 20-rings, respectively. A marked suppression of the diatropicity in the 18π moiety was observed being in the same trend in other tetrakisdehydro[4n]annuleno[4n′+2]annulenes. The 1H NMR spectroscopic behavior of the annulenoannulenes is consistent with theoretical conclusion. |
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