Synthesis of Bis-(Trifluoromethyl) Trisulfide and Bis- (Trifluoromethylthio) Selenide
Final rept. Mar 1989-Dec 1990,
GEO-CENTERS INC FORT WASHINGTON MD
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The reaction of trifluoromethylsulfenyl chloride with hydrogen sulfide at -78 deg C and in the presence of a catalyst, namely 4- dimethylaminopyridine, furnished excellent yields of the desired bis- trifluoromethyl trisulfide in under 24 hrs. The previous preparation of this product required 30 days at room temperature. Bis-trifluoromethyl di- and pentasulfides were characterized as by-products by their gas chromatographicmass spectrometric data. Replacement of the above catalyst with pyridine or N,N- dimethylaniline or triethylamine considerably reduced the yields of the expected product. Under similar experimental conditions, using hydrogen selenide bis- trifluoromethylthio selenide has been prepared for the first time. The structures assigned to these compounds have been confirmed by their mass spectral data.
- Organic Chemistry