Bis(perfluoroalkyl)sulfur difluorides and bis(perfluoroalkyl) sulfoxides

Alternative fire suppressant chemicals :

“…The boiling points and heats of vaporization for a series of perfluorinated sulfoxides are shown in the adjacent table and graph. 102 As a whole, the boiling points are higher than desired for total flooding halon substitutes. f. Overall Assessment.…”

“…The following table includes some boiling points and heats of vaporization. 102,103 Of particular interest is the decrease in boiling point with fluorination.…”

“…Colligative Properties. The boiling points and heats of vaporization for a series of perfluorinated compounds are shown in the following table and graph 102. All but the lowest boiling points are higher than optimum for halon 1301 substitutes.…”

Precursors and derivatives of bis(perfluoroalkyl) sulfoxides

“…After CF3SF2CF3 had been in contact with yellow HgO at 25°for about a week, 10% was converted to CF3S(0)CF3. 25 While higher temperatures could increase the rate and extent of this reaction, it was not pursued further since the reaction of anhydrous hydrogen chloride with the bis(perfluoroalkyl)sulfur or tetra(per-(26) F. Seel, W. Gombler, and R, Budenz, Angew. Chem., Int.…”

“…The fact that Ja-cFss ^Jb-cfss is also evidence for magnetic nonequivalence. 25 Fluorination of the sulfoxides with chlorine monofluoride gave rise to sulfur oxydifluorides, (Rf)2S(0)F2, where simple first-order spectra were obtained with magnetically equivalent «-methylene fluorines. The presence of S=0 in place of the lone pair does not give rise to a preferred rotamer, but rather free rotation must occur which results in an average of all possible rotamers.…”