1: iodine; Na2S2O8 / dimethylsulfoxide; H2O / 1 h / 20 °C 2: Na2S2O4 / dimethylsulfoxide / 100 °C 3: 54 percent / Na2S2O8; iodine / H2O; dimethylsulfoxide / 1 h / 20 °C View Scheme

sodium peroxodisulphate; iodine in water; dimethyl sulfoxide T=20°C; 1 h;