Trifluoromethyl trifluoromethylthio

Tellurium, evaporated from a resistively heated crucible, reacted with the species formed by applying radio frequency energy to bis[trifluoromethyl] disulfide. One of the products isolated was trifluoromethyl trifluoromethylthio tellurium. ... 

To date, however, only few reactions between phosphine and a non-metal halide, in which a chemical bond is formed between phosphorus and a non-metal by HCl condensation, are known. To these, apart from the above-mentioned reactions, belongs also the reaction with CF3SCI which, depending upon the chosen proportions of the reactants, in a sealed tube at -95 °C leads to the formation of (CF3S)2PH or (CF3S)3P Both compounds are not very stable thermally and decompose at 40-50 °C. Tris(trifluoromethylthio)-phosphine forms an unstable adduct with chlorine, which decomposes at 0 °C to give a mixture of PCI3, bis(trifluoromethyl)-disulphide and trifluoromethyl-sulphenyl chloride. 

Tellurium, evaporated from a crucible, reacted with trifluoromethylthio radicals, generated from bis[trifluoromethyl] disulfane in a radio-frequency glow discharge, in a vessel equipped with a cold finger chilled with liquid nitrogen and evacuated to 0.001 torr. Trap-to-trap distillation of the material that condensed in the cold finger produced bis[trifluoromethylthio tellurium. The thermally unstable compound condensed in the - 45° trap4. 

Methyl trifluoromethylthio tellurium could not be obtained in pure form from the reaction of dimethyl ditellurium with bis[trifluoromethyl] disulfide. At 20° the product is in equilibrium with the reactants0 ... 

Incorporation of the trifluoromethyl thiol moiety into heterocyclic systems may be achieved by several methods (92T6633). Trifluoromethylthio-lation of heteroaromatic compounds with trifluoromethansulfenyl chloride occurs via a free radical chain mechanism (77CB67) (Scheme 17). 

Few examples of cycloaddition reactions of the type [2 + 2+1] where fluorosubstituted compounds are participating are known. Perfluoro-2-butyne and elemental sulfur react to give tetrakis(trifluoromethyl)thio-phene [84JFC(25)47]. Analogously, a mixture of tetrakis(trifluoromethyl-thio)thiophene, 2,3,4-tris(trifluoromethylthio)-5-trifluoromethylthiophene, and tetrakis(trifluoromethylthio)-l,2-dithiin was obtained from bis(triflu-oromethylthio)acetylene and sulfur at 170°C (85JHC1631) (Scheme 91). 

When trifluoromethyl disulfide (CF3S)2 is in contact with mercury and the mixture is iriadiated by ultraviolet light, the two substances combine to form bis(trifluoromethylthio)mercury, (CF3S)2Hg (Brandt et al., 26), Bis(heptafluoropropylthio)mercury, (C3F7S)2Hg has also been produced (HI). The compound, (CF3S)2Hg, is also formed by the reaction of mercuric fluoride with carbon disulfide at about 250°. (CF3S)2Hg melts at 37-38° (220). 

Although the reactivity with different carbon electrophiles has been widely documented, there are not many examples of synthetically useful carbon-sulfur bond formation at the thiazole carbons. For instance, the regio- and chemoselective cleavage of the carbon-silicon bond of 2-TST (1) by trifluoromethyl-sulfenyl chloride was reported to take place at —78 °C. The expected 2-(trifluoromethylthio)thiazole was obtained with satisfactory 3uelds (eq 27). ... 

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