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ESR-Spectroscopic Investigation of Radical Cations, Radical Anions, and Radical Trianions of Didehydro[n]annulenes

✍ Scribed by Walter Huber

Publisher
John Wiley and Sons
Year
1985
Tongue
German
Weight
498 KB
Volume
68
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

The didehydro[n]annulenes 1 (n = 14), 2 (n = 18), and 3 (n = 22) are oxidized to radical cations. Reduction of the title compounds leads to radical anions and, in the case of 2 and 3, to radical trianions. The hyperfine data of the paramagnetic derivatives are rationalized in terms of the occupation of n‐membered (n = 14, 18, 22) π‐perimeter MO's (HOMO, LUMO, NLUMO). The contact‐ion pairs of the radical anions show unexpectedly large alkali‐metal coupling constants.

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