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Tetrakisdehydro[16]annuleno[18]annulene

โœ 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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โœฆ 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.


๐Ÿ“œ SIMILAR VOLUMES


Tetrakisdehydro[18]annuleno[20]annulene
โœ Yukihiro Yoshikawa; Masahiko Iyoda; Masazumi Nakagawa ๐Ÿ“‚ Article ๐Ÿ“… 1981 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 417 KB
Tetrakisdehydro[14]annuleno[16]annulene
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โœ Yukihiro Yoshikawa; Masahiko Iyoda; Masazumi Nakagawa ๐Ÿ“‚ Article ๐Ÿ“… 1981 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 225 KB

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

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โœ Yukihiro Yoshikawa; Masahiko Iyoda; Masazurni Nakagawa; Shin'ichi Nakatsuji; Shu ๐Ÿ“‚ Article ๐Ÿ“… 1981 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 233 KB

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.

Synthesis of a [18]annuleno[18]annulene
โœ Masanari Osuka; Yukihiro Yoshikawa; Shuzo Akiyama; Masazumi Nakagawa ๐Ÿ“‚ Article ๐Ÿ“… 1977 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 227 KB

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

Synthesis of a [14]annuleno[18]annulene
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