Abstract
(CH3)2AsSC2H5, prepared from (CH3)2AsCl and Pb(SC2H5)2, and ((CH3)2As)2S2 react with RfI at 100° to give the compounds (CH3)2AsRf (Rf = CF3, C3F7). The compounds AS2Sx (x = 2, 3) do not react with CF3I at 100°. ((CF3)2As)2S, prepared from (CF3)2AsI and Ag2S or from (CF3)2AsH and S, reacts with Hg to give ((CF3)2As)2, decomposes at 175° to give (CF3)3As, and reacts with CF3I at 125° to give mainly (CF3)3As. Some (CF3)2AsI and CF3SAs(CF3)2 is also produced from this last reaction.