sulfur dioxide; potassium iodide in further solvent(s)
in conc. HCl, then addn. of aq. ethanol, aq. methanol or dilute HCl to mixture redn. with gaseous SO2 then hydrolysis with ice-cold aq. NH3; ppt. washing with alcohol and dried;
sulfur dioxide in further solvent(s)
in conc. HCl, then addn. of aq. ethanol, aq. methanol or dilute HCl to mixture redn. with gaseous SO2 then hydrolysis with ice-cold aq. NH3; ppt. washing with alcohol and dried;
