Difluoro disulfur

F2S2 1.2- Difluorodisulfane Disulfur 1,2-difluoride 1.2- Difluoro disulfur Cz... 

Furan-2,5-dicarboxylic acid reacts similarly, but a temperature of 150°C is required for the reactions to proceed. Again, reaction in the presence of disulfur dichloride gives exclusively the fluorinated product, 2,5-difluoro-2,5-bis(trifluoromethyl)-2,5-dihydrofuran (21), while in the presence of chlorine a mixture of chlorofluoro derivatives 22 and 23 is formed.245... 

The lower fluorides, S2F2 and SF4, disproportionate readily into sulfur and SF6. The difluoro compound, S2F2, demonstrates unusual structural isomerism in that it can exist in two forms disulfur difluoride, F—S—S—F (12.8) and thiothionyl fluoride, S=SP2 (12.9). 

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