Abstract
Abstract : The aminophosphine sulfides, (CF3)2P(S)NR2, where R = H or CH3, and the halophosphine sulfides, (CF3)2P(S)X, where X = F, Cl, Br, and I, are prepared by heating the corresponding phosphines with sulfur. The chloro and bromo compounds are best prepared by the action of the appropriate hydrogen halide on (CF3)2P(S)-NMe2, while the fluoride is conveniently obtained by the action of antimony trifluoride on (CF3)2P(S)Br. When the iodo compound is shaken with mercury, (CF3)2PSP(CF3)2 is formed, while with mercury and hydrogen iodide the product is (CF3)2PSH, formed by an anti-Arbuzov rearrangement. Bis(trifluoromethyl)dithiophosphinic acid, (CF3)2P(S)SH, is formed by heating sulfur with either (CF3)2PH or (CF3)2PSH. Addition of sulfur to CF3PFNMe2 and PF2NMe2 also gives the corresponding sulfides. The nmr and mass spectra of the new compounds are discussed. (Author)
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