Synthesis and dielectric properties of the eco-friendly insulating gas thiazyl trifluoride

Abstract

An efficient two-step synthetic method of a brand-new environment-friendly insulating gas thiazyl trifluoride was introduced.

Ex situ Generation of Thiazyl Trifluoride (NSF3) as a Gaseous SuFEx Hub**

“…During the optimization of NSF 3 gas generation, we noticed that the 19 F NMR spectrum of NSF 3 appears as a 1 : 1 : 1 triplet (Figure 1A, top), a phenomenon that had been observed before. [29] While somehow unusual for quadrupolar nuclei such as 14 N, J-coupling can be seen in case of highly symmetric molecules as is the case for NSF 3 .…”

“…[29] While somehow unusual for quadrupolar nuclei such as 14 N, J-coupling can be seen in case of highly symmetric molecules as is the case for NSF 3 . Indeed, we here observed a 2 J-coupling constant between 19 F-14 N of 25.3 Hz. To further elaborate on this, 15 synthesized from the 15 N isotope labeled pentafluorobenzamide.…”

“…Conveniently, filtering off the solid cyanuric acid produced a sufficiently pure MeCN solution of the gas precursor, which was used as such for gas generation. Finally, in a tube already containing 4.0 equiv of AgF 2 , the precursor solution reacted efficiently to form the hydrolytically stable NSF 3 gas at room temperature with > 99 % 19 F NMR yield, consistently over several experiments (for optimization and hydrolysis study of NSF 3 , see Supporting Information section 3.4).…”

“…In addition, a lower-intensity doublet with the same coupling constant was observed which could be attributed to the 34 S isotopomer; the 95.0 : 4.22 integration ratio for both doublets matches the 32 S: 34 S natural abundance ratio. [30] When, 15 NSF 3 was used as the SuFEx hub to produce the 15 N labeled thiazyne 2 (details, see Supporting Information section 4.8), its 19 F- 15 N HMBC spectrum clearly shows correlations between fluorine and nitrogen due to this 2 J coupling constant (Figure 1B).…”

Investigation on insulation properties of HFO‐1336mzz(E) and N 2 /CO 2 mixtures as SF 6 substitutes in gas‐insulated electrical applications

“…Luo's group is committed to the development of the insulating gas [19–22]. In our recent study, the trans‐1,1,1,4,4,4‐hexafluoro‐2‐butene (HFO‐1336mzz(E), CF 3 ‐CH=CH‐CF 3 ) is proposed as a potential insulating medium.…”