The formal replacements of a -CH= group of benzene by -A= and -"s= groups give 6,, non-benzenoid aromatic systems, pyrylium and thiopyrylium cations, respectively. Both the cations are supposed to be resonance hybrids of Kekulg-type structures (A) and carbonium ion structures (B) in the ground stat
Electronic spectra and structures of thiopyrylium and pyrylium cations
โ Scribed by Z. Yoshida; H. Sugimoto; S. Yoneda
- Publisher
- Elsevier Science
- Year
- 1972
- Tongue
- French
- Weight
- 446 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0040-4020
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
The electronic absorption and fluorescence spectra of the cation derived from 9-aminoanthracene (9-anthrylamine), in water, are anomalous by comparison with those of the 1-and 2-anthrylammonium ions. The similarities of the spectra of the cation of 9-anthrylamine with those of anthrone and its catio
The electronic and vibrational spectra of tetracene cations, generated by vapor-phase electron bombardment and deposited in an argon matrix, have been recorded. Integrated intensities of the infrared bands of neutral and cationic tetracene compare well with a recent density functional calculation by