Pentafluorothio olefins

The reactions of pentafluorothio olefins are broad, with cycloadditions being rare l-SF5-l,3-cyclohexadiene can be dehydrogenated to QH5SF5 (20). Additions of halogens and pseudohalogens take place easily nucleophilic and electrophilic additions or nucleophilic substitutions may occur (20,21). 

As with other perfluoro olefins, it is found that certain pentafluorothio olefins will form perfluoro carbanions. This is either deduced from the isolation of products which are formed through their intermediacy or through direct observation. One general feature of such SF5-anionic species in solution seems to be a yellow color, as well as the substantial low-field n.m.r. shift of all sulfur bonded fluorine resonances (they appear at 80-110 ppm, instead of 50-80 ppm in the neutral species). With the olefin SF5(CF3)C=CF2 and metal fluorides the following reactions are observed ... 

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See also in sourсe #XX -- [ ]

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