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- Title
Radical Ions in the Pentalene Series. Part. I. 1,3,5-tri-t-butylpentalene.
- Authors
Fürderer, Peter; Gerson, Fabina; Hafner, Klaus
- Abstract
The ESR. spectra of the radical anion and cation of 1, 3, 5-tri-t-butylpentalene (II) have been reexamined under higher resolution. With the assistance of the ENDOR. technique, the coupling constants of all protons in II⊖. and II⊖. could be determined. The experimental data agree satisfactorily with the values predicted by the simple MO model which suggests that the π-spin distributions in II⊖. and II⊖. should not strongly differ from those in the corresponding radical ions of parent pentalene (I). As in the case of other non-alternant hydrocarbons, the proton coupling constants for II⊖. are very sensitive to experimental conditions, due to the association of the radical anion with its counterion. Spectra of II⊖. taken at low temperatures (down to 133 and 163 K for ESR. and ENDOR., respectively) have not revealed specific line-broadening which could arise from the bond shift between the two Kekulé-structures of pentalene.
- Publication
Helvetica Chimica Acta, 1978, Vol 61, Issue 8, p2974
- ISSN
0018-019X
- Publication type
Article
- DOI
10.1002/hlca.19780610822