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On the Homoconjugation of Two Acceptor Groups

✍ Scribed by Thomas Doerner; Rolf Gleiter; Franz A. Neugebauer

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 440 KB
Volume: 1998
Category: Article
ISSN: 1434-193X
DOI: 10.1002/(sici)1099-0690(199808)1998:8<1615::aid-ejoc1615>3.0.co;2-n

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✦ Synopsis

Cyclovoltammetric investigations have been carried out on second reduction potentials was found. The ESR results of the radical anion 20 •-are in support of a strong 3,3,6,6-tetramethylcyclohexane-1,2,4,5-tetrone (4), bicyclo-[3.2.2]nonane-6,7,8,9-tetrone ( ), and several of their homoconjugation. ESR studies of 4 •-, 13 •-, and 17 •-also reveal a symmetrical displacement of the unpaired electron congeners, such as 6,13-dihydro-6,6,13,13-tetramethylquinoxalino[2.3-b]phenazine (13), 5,10-dihydro-5,5,10,10-tetra-over both acceptor groups on the ESR time scale which, however, based on the small potential difference ∆E°Յ 200 methylpyrazino[2,3-g]quinoxaline (17), and 6,13-dihydro-6,13-propanoquinoxalino[2,3-b]phenazine (20). For 5 and 20 mV can be most likely described to a fast electron exchange. a large difference (∆E°Ն400 mV) between the first and

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