Thiazyl fluoride, reaction with

Urea, melamine, cyanamide, dicyandiamide, and guanidine react at elevated temperatures with sulfur tetrafluoride to give (trifluoromethyl)iminosulfur difluoride (7) in 6-25% yield.172 In the presence of sodium fluoride at 25"C, urea is converted into fluorocarbonyliminosulfur difluoride (8), but at 50°C thiazyl fluoride (9) is the main product, both formed in ca. 60% yield. At higher temperatures, carbonyl difluoride (carbonic difluoride) and sulfur hexafluoride are the sole products of the reaction of urea with sulfur tetrafluoride.173... 

Primary amines react with sulfur tetrafluoride to form an N=S bond. Ammonia reacts with sulfur tetrafluoride at ambient temperature in a flow system to form an unstable gas, thiazyl fluoride (N =SF. 20 Vo).193 194 The reaction with melhylamine conducted at low temperatures affords methyliminosulfur difluoride (1) with excess methylaminc, bis(melhylimino)sulfur is formed as the main product.195,196... 

Nitroxides, Hydroxylamines, and Nitroso- and Nitro-compounds. The chemistry of the magic radical , bistrifluoromethyl nitroxide, and related compounds particularly (CF3)jN OH and [(CFj),N O],Hg has been dealt with at some length in the review literature full details of the work on reactions between (i) the nitroxide and tetrasulphur tetranitride -> N4S4[O N(CF8)2]4, also obtainable from (CFj),N-0- + N4S4H4 or N3S3CI3 and [(CF3)jN-0]jHg + N3S3CI3, (ii) the mercurial [(CF3)3N-0]3Hg and thiazyl fluoride - ... 

---