Until recently the only pentachlorophenyl-silicon compound reported in the literature was (pentachIorophenyl) trichlorosilane, formed in low yield by the catalytic chlorination of phenyltrichforosilane'. The preparation of pentafluorophenylmagnesium halides2m3 and pentafluorophenyllithium~*' led to the formation of silnnes con tainingoneor more pen tafiuorophenylgroups directly bonded to a silicon a tom”*-. By the use of ...
