Browsing by Author "SAMUEL, E"

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    ELECTROCHEMISTRY OF 9,9'-BIFLUORENYLIDENE - DETECTION OF THE RADICAL SPECIES BY SPECTROELECTROCHEMICAL AND EPR METHODS
    (1992) OTERO, M; ROMAN, E; SAMUEL, E; GOURIER, D
    It is shown by cyclic voltammetry and differential pulse polarography that 9,9'-bifluorenylidene (BFD) undergoes two successive reduction waves in aprotic solvents corresponding to two monoelectronic transfers: a reversible (E1 = - 1.10 V SCE) followed by a quasi-reversible (E2 = - 1.50 V SCE) couple. These were monitored by spectrochemical methods and kinetic data were obtained for the individual monoelectronic transfers. The monoradical was detected by EPR, and the spectrum interpreted in terms of delocalization of the unpaired electron on the two fluorenyl fragments.