The Radical Anions of Heptalene and 1, 7-Methano-[12]annulene
✍ Scribed by Klaus Müllen
- Publisher
- John Wiley and Sons
- Year
- 1974
- Tongue
- German
- Weight
- 503 KB
- Volume
- 57
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
The radical anions of heptalene and of 1, 7‐methano‐[12]annulene are generated by metal reduction and characterized by means of their ESR‐spectra. Whereas the neutral hydrocarbons are π‐bond localized their corresponding radical anions turn out to be π‐bond delocalized. This could be deduced from an interpretation of the different hyperfine splittings using a simple MO‐model.
📜 SIMILAR VOLUMES
## Abstract ESR. and ENDOR. spectra are reported for the radical anion of the 2‐methyl derivative (III) of 1,6‐methano[10]annulene (I). Comparison of the hyperfine data for I·⊖ and III·⊖ with those for the radical anions of naphthalene (II) and its 1‐methyl derivative (IV), respectively, confirms t
## Abstract ESR. spectra of the radical anions of 1, 6‐methano[__10__]annulene (I) and its 2,5,7,10‐tetradeuterio derivative II are reported for a temperature range of over 100°. The abnormally small magnitudes of the α‐proton coupling constants are attributed to the deviation of the tenmembered π‐
The magnetic circular dichrcism (MCD) and absorption spectra of the monovalent anion of tribenzo [ 121 annulene have been measured in the visiib and the near-infrared region. Ihe absence of a temperature dependence of the MCD proves a non-degenerate ground state. An as.sigrunent of the spectra has b