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- Title
The Radical Anions of N, N′-Dicyanoquinone Diimines, a New Class of Electron Acceptors.
- Authors
Gerson, Fabian; Gescheidt, Georg; Möckel, Reinhart; Aumüller, Alexander; Erk, Peter; Hünig, Siegfried
- Abstract
The radical anions of 12 N, N′-dicyanoquinone diimines, a new class of electron acceptors, hace been characterized by their hyperfine data with the use of ESR and ENDOR spectroscopy. The largest coupling constant (0.30-0.45 mT), due to the two 14N nuclei in the exocyclic positions, gives rise to a conspicuous broadening of the peripheral ESR lines by an incomplete averaging of the hyperfine anisotropy. The most plausible interpretation of the experimental results for the radical anions of N, N′-dicyano- 1,4-benzoquinone diimine ( 1) and N, N′-Dicyano-9,10-anthraquinone diimine ( 9) is in terms of both 'syn'- and 'anti'-configurations contributing to the ESR and ENDOR spectra and having equal proton- and 14N-coupling constants. The π-spin distribution in the radical anions of N, N′-dicyanoquinone diimines is compared with those in the analogous ions of tetracyanoquinodimethanes and quinones.
- Publication
Helvetica Chimica Acta, 1988, Vol 71, Issue 7, p1665
- ISSN
0018-019X
- Publication type
Article
- DOI
10.1002/hlca.19880710712