Synthesis and Characterization of Bis(trifluoromethyl)thiophosphinic Acid and Its Anhydride,
ALBERTA UNIV EDMONTON DEPT OF CHEMISTRY
Pagination or Media Count:
Bistrifluoromethylthiophosphinic acid, CF32PSOH, has been prepared by the reaction of concentrated sulfuric acid with salts of the acid. The new moderately strong monothio acid is stable in aqueous solution but yields 1 mol of CF3H per mole of acid upon alkaline hydrolysis. The acid has been characterized by chemical and spectroscopic methods including gas-phase infrared spectra which suggest that the acid has the CF32PSOH structure. Dehydration of the acid with P4O10 proceeds smoothly to give good yields of the anhydride, CF32PS2O, which is extremely inert toward electrophilic reagents such as hydrogen halides and hydrogen sulfide. The infrared and nmr spectral properties of the acid and its anhydride are discussed. The anhydrides reactions are also discussed.
- Organic Chemistry