Tetrafluoro-l,2,3-trithiolane

The sole representative in the trithiolane series containing halogen substituents in the ring is tetrafluoro-l,2,3-trithiolane (35). It is found in 10% yield associated with the major product tetrafluoro-l,2,3,4-tetrathiane (204) by reaction of tetrafluoroethylene with the vapors of boiling sulfur at atmospheric pressure (62JOC3995). The compound is rather unstable and rapidly polymerized as described in Section 4.33.3.1.4. 

Under certain conditions, alkenes react with elemental sulfur or sulfur-rich compounds to yield cyclic polysnlfanes. Tefraflnorethylene, C2F4, reacts with boiling elemental snlfur (445 °C) to give tetrafluoro-l,2,3-trithiolane (yield 10%) and tefrafluoro-l,2,3,4-tefrathiane (60%) both compounds are malodorous oUs. Ordinary hydrocarbons would yield H2S under these conditions, therefore, a catalyst or irradiation is applied to achieve milder reaction conditions. When a mixture of norbomene and Sg in CS2 is irradiated (wavelength 3 50 nm), besides other products, the trithiolane derivative (11) is formed (77% yield equation 90). ... 

The sole representative in the trithiolane series containing halogen substituents in the ring is tetrafluoro-l,2,3-trithiolane (35). It is found in 10% yield associated with the major ... 

Tetrafluoro-l,2,3-trithiolane 189 was synthesized by the reaction of sulfur with tetrafluoroethene. At elevated temperature, tetrafluoroethylene reacts with the complex S4(Sb2Fi 1)2 with the formation of perfluoro-3,5-dimethyl-3,5-diethyl-1,2,4-trithiolane 190. ... 

Refluxing a reservoir of sulfur (445 °Q and passing the tetrafluoroethylene directly into the hot sulfur vapor gives three monomers namely tetrafluoro-1,2,3,4-tetrathiane (cyclfc tetrasulfide), tetrafluoro-l,2,3-trithiolane (cyclic trisulfide) and tetrafluorothirane (cyclic sulfide) respectively [140] ... 

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