Effects of condensing temperature on the purity of NSF₃^a.

Entry	Condensing temperature/°C	Purityb/%
1	−5	49
2	−10	60
3	−15	90
4	−20	82
5	−25	75

^aReaction conditions: S₄N₄ (3 mmol), AgF₂ (48 mmol), and CCl₄ (waterless, 30 mL). The reaction was carried out under stirring at 78 °C for 2 hours, and the gas mixture was condensed at different temperatures.

^bGC purity.