in methanol; ammonia moderate heating of methanolic soln. of C8H9N3S and NH3 soln. of CuCl;; ppt.; washing with dild. HCl, H2O and alc.;;

in ethanol hot soln. of Cu-salt in EtOH treated with a hot soln. of thiosemicarbazone in ethanol, mixture refluxed for 30 min, left to cool; filtered, washed with ethanol and ether; elem. anal.;