Pentafluorosulfanyl Hypohalites, SF5OX

Although SF5OF (b.p., -55.rC) is thermally stable to about 200°C, at higher temperatures it decomposes to SF6 and 02 (70). Photolysis 

Pentafluorosulfanyl hypofluorite adds readily to a number of alkenes to give only one product, containing the components SF50 and F (77, 78). Because of its facile synthesis, some use is made of SF5OF in electrophilic fluorination (79). The gas-phase structure of SF5OF is reported (SO). 

This hypochlorite is considerably less stable than the hypofluorite. The hypobromite and hypoiodite have not been prepared. Pentafluorosulfanyl hypochlorite is synthesized from C1F and SOF4 in the presence 

Because of the partial positive charge associated with chlorine in the hypochlorite, SF5OCl reacts readily with molecules containing negative chlorine. Seppelt exploited this property (87) and reacted SF5OCl with HC1 at -95°C to obtain the unstable pentafluoroorthosulfuric acid, SF5OH, which decomposes via elimination of HF at -60°C. Al- 

A low-temperature addition reaction occurs between SF5OCl and symmetric fluoroolefins to form pentafluorosulfanylalkyl ethers in nearly quantitative yields (78,90-92). It is found that with unsymmet-rical olefins the chlorine atom of the hypochlorite most often bonds to the olefinic carbon atom with higher electron density. The reactions of SF6OCl and SF5OF with fluorinated ethylenes are used to prepare new SF50-substituted fluorocarbons in 44-77% yield (93). 

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