in water soln. of ZnSO4 added dropwise to aq. soln. of Na compd.; filtered; ppt. dried in vac.;

in ethanol byproducts: di-n-butylammonium chloride; dropwise addn. of di-n-butylammonium di-n-butyldithiocarbamate (in ethanol) to a stirred soln. of ZnCl2 (in ethanol) in 1:2 mol proportion under anhydrous conditions; filtration, washing with ethanol, drying in vac., elem. anal.;

byproducts: [NMe4][S2CNMe2];