New alkyliodonium derivatives stabilized by ammonium or phosphonium groups

Alkyliodine(III) dichlorides 2a,b and bis(trifluoroacetate) 4, which are st abilized due to the presence of the electron-withdrawing trialkylammonium o r triphenylphosphonium groups, can be prepared from readily available iodom ethyl phosphonium and ammonium salts 1a,b. Decomposition of dichlorides 2 i n the solution affords chloromethyl phosphonium and ammonium salts 3; the s tructure of the chloromethyl phosphonium salt 3b (as a tetrachloroiodinate) was established by a single-crystal X-ray analysis. (C) 1999 Elsevier Scie nce Ltd. All rights reserved.