ISSN:
0044-2313
Keywords:
Pentafluorosulfanyl-substituted perfluorinated carbanions
;
electrochemical and ESR investigation
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Electrochemical Investigations of SF5-Substituted CarbanionsThe perfluorinated carbanions SF5—C(CF3)2- and [(SF5)2C—CF3]- are sufficently stable in acetonitrile to be investigated by electrochemical methods. The oxidation of [(SF5)2C—CF3]- at +1.24 V (vs. SCE) results in the formation of the radical [(SF5)2C—CF3], which can be detected by ESR methods. The oxidation of [SF5—C(CF3)2]- at +1.55 V leads only to the radical (CF3)2C = C(CF3)2-, a secondary product. The carbanions [SF5—C(CF3)2]- and [(SF5)2C—CF3]-, the unsaturated compounds (SF5)2C = CF2, SF5—C(CF3) = CF2 and SF5—C(CH3) = CF2 as well as (SF5)2CH2 are irreversibly reduced at a potential range from -0.6 V to -0.8 V.
Notes:
Die perfluorierten Carbanionen [SF5—C(CF3)2]- und [(SF5)2C—CF3]- sind in Acetonitril hinreichend stabil, um elektrochemisch untersucht werden zu können. Die Oxidation von [(SF5)2C—CF3]- führt bei +1,24 V (vs. SCE) zu dem in ESR-Experiment beobachtbaren Radikal [(SF5)2C—CF3]. Für [SF5—C(CF3)2]-führt die Oxidation bei +1,55 V nur zu dem radikalischen Folgeprodukt (CF3)2C = C(CF3)2-. Die Carbanionen [SF5—C(CF3)2]- und [(SF5)2C—CF3]-, die ungesättigten Verbindungen (SF5)2C = CF2, SF5—C(CF3) = CF2 und SF5—C(CH3 = CF2) wie auch (SF5)2CH2 werden im Potentialbereich von -0,6 V bis -0,8 V irreversibel reduziert.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19916020110
