JHAZMAT 174-2010-581

Complete electrochemical dechlorination of chlorobenzenes in the presence of
various arene mediators

Electrochemical dechlorination of chlorobenzenes in the presence of various arene mediators such as
naphthalene, biphenyl, phenanthrene, anthracene, and pyrene, was studied. The amount of mediator
required was able to be reduced to 0.01 equiv. for all mediators except for anthracene, with the complete
dechlorination of mono-, 1,3-di- and 1,2,4-trichlorobenzene still achieved. This catalytic amount of mediator
plays an important role in accelerating the dechlorination through the rapid formation of radical
anions prior to reduction of the chlorobenzenes.