in dichloro difluoro methane 3 d at 0°C, 1:1 molar ratio; The reactor was pumped for 3 h at 0°C to remove the byproducts, elem. anal.;

in dichloro difluoro methane byproducts: [N(SO2F)2]2, SO2F2, HF; 2 weeks from -22°C to -12°C, 2:1 molar ratio; The reactor was pumped at -4°C to remove the byproducts, elem. anal.;