Pentafluorosulfanylalkanes, Alkenes, and Alkynes

Electrofluorination of alkane thiols in AHF leads to variable yields of perfluoroalkylpentafluorosulfur(VI) compounds (101, 102). Dithiols 

Electrochemical fluorination of sulfur dissolved in CS2 in the presence of chlorine gives several products, including SF5CF3, SF5CF2SF5, and CF2C1SF5 (104). The reaction of elemental fluorine with branched alkyl mercaptans or sulfides gives SF5 organofluorine compounds (105). 

Direct fluorination of CS2 with F2 diluted with He at - 120°C (3 days), followed by warming to -80°C (3 days), gives a 15% yield of (SF5)2CF2 (106,107). The IR spectrum of this product is in agreement with that provided earlier (108). The gas-phase structure of (SF5)2CF2 is reported (109). 

The compound SF6CH3 can be obtained from SF6CH2COOAg by the following sequence of reactions. 

Similarly, SF6CH2F (113) and SF5CHF2 (114) are also formed. The parent acid is obtained by the reaction of SF5C1 with the ketene, CH2= C=0, followed by hydrolysis of the resulting acid chloride (110-112). 

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