zinc in water; dimethyl sulfoxide addn. of C4F9I at 40°C over 3 h and SO2 for 3 h, stirring for 3 h at 40°C, solvent is removed and replaced with H2O, addn. of Cl2 at 35-45°C; distn.;
in 1,4-dioxane; water redn. of Na2SO3 for 4 h at 75-80°C, extracting with isopropylalcohol, evapn. to dryness, addn. of 5percent HCl, after addn. of Cl2;
