EFFECT OF MEDIUM ON CONCURRENT CHLORINATION OF TETRACHLOROETHENE AND 1,2-DICHLOROETHANE

The effects of nine solvents of different nature on the concurrent chl orination of tetrachloroethene and 1,2-dichloroethane were studied. Th e ratio of the rate constants for the radical chlorination of substrat es in nonaromatic solvents was shown to depend on the solubility const ant. Solvation of chlorine radicals by solvents of this sort is not sp ecific. The effect of aromatic solvents is associated with the formati on of the donor-acceptor complexes of aromatic molecules with chlorine radicals, which are the chlorination agents in radical chlorination. The relative activation parameters of the rate constants for the radic al chlorination of tetrachloroethene and 1,2-dichloroethane were deter mined. These parameters were shown to follow the isokinetic dependence for all solvents studied.