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The Radical Cations and the Radical Anions of Some Weitz-Type S-Donors

✍ Scribed by Fabian Gerson; Georg Gescheidt; Jürgen Knöbel; Ichiro Murata; Kazuhiro Nakasuji

Publisher
John Wiley and Sons
Year
1987
Tongue
German
Weight
409 KB
Volume
70
Category
Article
ISSN
0018-019X

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✦ Synopsis

The radical cations and the radical anions of 1,6-dithiapyrene (1) and 3,lO-dithiaperylene (2) as well as those of three further Weitz-type S-donors 3,4, and 5 have been studied by ESR spectroscopy. The experimental findings for 1: (widths and behaviour on saturation of hyperfine lines) suggest that the ground state of this radical anion is effectively degenerate. With the exception of 1 :, the ESR studies of all radical ions could be complemented by the use of the ENDOR and general TRIPLE resonance techniques. In addition to proton hyperfine data, 33S coupling constants have been determined for 1 (0.34 mT); they are in agreement with the predicted substantial n-spin populations at the S-atoms.

(0.53 mT), 2 (0.46 mT), and 4

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