in ethanol to soln. of Sn compd. soln. of HgCl2 added, refluxed for 5 h; evapd. dissolved in CH2Cl2, PhHgCl filtered off, filtrate concd., redissolved in CHCl3, filtered, CHCl3 removed, residue recrystd. from CHCl3-light petroleum; elem. anal.;

methyl iodide soln. of Sn compd. in MeI refluxed for 48 h; Sn compd. isolated, yield of CH3SC6H5CH3 determined by g.l.c.;

bromine in tetrachloromethane to soln. of Sn compd. Br2 added dropwise at 0 °C;