Tetrakisdehydro[16]annuleno[18]annulene
โ Scribed by Koichi Sakano; Tsutomu Nakagawa; Masahiko Iyoda; Masazumi Nakagawa
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- French
- Weight
- 230 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0040-4039
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โฆ Synopsis
Sununary: Tetrakisdehydro[16]annuleno[l8]annulene consisting of trisdehydro[16]annulene and dehydro[18]annulene has been synthesized. Induction of para-and diamagnetic ring currents 16-and 18-membered rings, respectively, was clearly recognized by the H NMR spectroscopy. marked suppresion of the diatropicity in the 18n moiety was observed in the same trend as observed in tetrakisdehydro[14]annuleno[l6]annulene.
๐ SIMILAR VOLUMES
Tetrakisdehydro[14]annuleno[20]annulene consisting of an aromatic bisdehydro[14]annulene and an antiaromatic trisdehydro[20]annulene has been synthesized. The 'H NMR spectra clearly indicate the induction of para-and diamagnetic ring currents in each of the [4n]-and [4n+2]rings, respectively. Recent
All new compounds described in this paper gave IR, NMR, and mass spectral data consistent with the assigned structures and satisfactory elemental analyses were obtained.
Recently bicyclic systems consisting of two fused annulene rings (annulenoannulenes) have received considrable attention. We have reported the synthesis of tetra-t-butylhexakisdehydro[lZ.l2.4] [18]annuleno[l8]annulene (1) and tetrat-butyltrisdehydro[lO.lO.2][14]annuleno[l4]annulene (2) consisting of