ELECTROCHEMICAL REDUCTION OF CF2Br2 ALONE. NUMBER OF ELECTRONS CONSUMED

  • MEDAGHRI-ALAOUI A.
    UNIVERSITÉ DE MONTPELLIER II, URA CNRS 1097, PLACE E.BATAILLON, 34095 MONTPELLIER CEDEX 05, FRANCE
  • CALAS P.
    UNIVERSITÉ DE MONTPELLIER II, URA CNRS 1097, PLACE E.BATAILLON, 34095 MONTPELLIER CEDEX 05, FRANCE
  • CHOUKROUN H.
    UNIVERSITÉ DE MONTPELLIER II, URA CNRS 1097, PLACE E.BATAILLON, 34095 MONTPELLIER CEDEX 05, FRANCE
  • COMMEYRAS A.
    UNIVERSITÉ DE MONTPELLIER II, URA CNRS 1097, PLACE E.BATAILLON, 34095 MONTPELLIER CEDEX 05, FRANCE
  • VERPEAUX J. N.
    ECOLE NORMALE SUPÉRIEURE, DÉPARTEMENT DE CHIMIE, URA CNRS 1679, 24 RUE LHOMOND, 75231 PARIS CEDEX 05, FRANCE
  • AMATORE C.
    ECOLE NORMALE SUPÉRIEURE, DÉPARTEMENT DE CHIMIE, URA CNRS 1679, 24 RUE LHOMOND, 75231 PARIS CEDEX 05, FRANCE

Abstract

Electrochemical reduction of CF2Br2 alone is investigated in DMF. In the absence of an added olefin, the reduction occurs via an overall two-electron ECEC process that proceeds through the intermediary formation of CF2Br.-, CF2Br. and CF2Br- that yields ultimately the carbine: CF2 that reacts with DMF. Also it is possible to determinate the value of the number of electrons consumed directly with the combination of peak current in LSV and limiting current at a rotating disk electrode, we found n = 2, we considered the reduction of CF2Br2 is bielectronic corresponding to the formation of the methide CF2Br-.

Cuvinte cheie

reduction number of electron linear sweep voltammetry glassy carbon cathode disk electrode