Аннотация
The electrochemical reduction of 3,3′-bi(2-R-5,5-dimethyl-4- oxopyrrolinylidene) 1,1′-dioxides (R = CF3, Me, Ph, Bu t), which are cyclic dinitrons with conjugated C=C bond, in acetonitrile is an EE process producing stable radical anions and dianions, whereas the electrochemical oxidation is an EEC (R = Me, Ph) or EE process (R = But) with formation of radical cations (except for the case of R = CF3) and dications (R = But) stable under standard conditions. Radical cations of the dioxides with R = Me, Ph, and But and radical anions of the whole series of the compounds studied, including R = CF3, were characterized by ESR spectroscopy combined with electrochemical measurements and quantum-chemical calculations. The electrochemical behavior of the But-substituted dinitron is unique: the EE processes in the region of negative and positive potentials with formation of the dianion, radical anion, radical cation, and dication stable at T = 298 K were observed for the first time within one cycle of potential sweep in the CV curve measured in MeCN.
Язык оригинала | английский |
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Страницы (с-по) | 1178-1184 |
Число страниц | 7 |
Журнал | Russian Chemical Bulletin |
Том | 54 |
Номер выпуска | 5 |
DOI | |
Состояние | Опубликовано - мая 2005 |
Опубликовано для внешнего пользования | Да |