Condensation of bromotrifluoromethane with potassium thiophenoxides in DMF is performed under pressure (2-3 atm) in a glass apparatus. Inhibition by nitrobenzene shows that a SRNl mechanism is involved in the formation of aryl trifluoromethyl sulfides. Dichlorodifluoromethane itself reacts through a similar process to give aryl chlorodifluoromethyl sulfides. Condensation of 1, 1, 2-trichlorotrifluoroethane with ...