Features of polychlorinated biphenyls nitration

Abstract

Nitration of mono-, di-, and trichlorobiphenyls has been studied. The nitration degree depends on the number of chlorine substituents; one to four nitro groups can be introduced. The conclusions have been confirmed by results of nitration of the "Trikhlorbifenil" technical mixture of polychlorinated biphenyls. GORBUNOVA et al. 1612 conditions to yield products of deeper nitration than were generally reported in the literature (Scheme 1). Tetranitrobiphenyls Ib (four isomers) were the major products, whereas content of the single trinitrobiphenyl isomer Ia in the products mixture was lower.