in methanol; water byproducts: NaI; aq. soln. NaOH was added to soln. Ph2(I)Sn(CH2)Sn(I)Ph2 in MeOH and stirred for 1 h at room temp.; ppt. was filtered, washed with water and MeOH and dried overnight; elem.anal.;

in methanol; water addn. of soln. of bromide in methanol to a soln. of NaOH in water, magnetical stirring; stirring, 3h;; filtration off of ppt.; washing with water and small amt. of methanol; drying; elem. anal.;;