SOME REACTIONS OF DIMETHYLTIN BIS-S,S'-(O-SODIUM THIOSULFATE) AND THESTRUCTURE OF ITS COMPLEX WITH DIBENZO-18-CROWN-6

The reactions of the title compound, Me2Sn(S-SO3Na.H2O)2, with alkylio dides and trimethyltin chloride in an aqueous medium, as well as with dibenzo-18-crown-6(DB-18-C-6) in acetone have been studied. The iodide s RI (R = Me, Et) attack both of the tin-sulfur bonds to give dimethyl tin diiodide and the respective disulfides, R2S2. Trimethyltin chlorid e enters an exchange reaction which involves sodium ions and affords M e2Sn(S-SO3SnMe3)2 as the reaction intermediate; the latter decomposes to ultimately give trimethyltin sulfate, dimethyltin thiosulfite, and elemental sulfur. An ionic complex, a(DB-18-C-6)(Me2CO)]+[Na(DB-18-C-6 )(Me2CO)(H2O)]+, soluble in acetone and methylene chloride has been al so synthesized, and its structure has been determined by means of X-ra y techniques.