in ethanol shaking of pure trans-(Pt(S(C4H9)2)2Br2) in alcohol for 24 h with freshly pptd. AgCl, then with AgCl, washed by H2O and alcohol; evaporation at ambient temperature;; extraction with petroleum ether (boiling point .<. 50°C); evaporation; repeated recrystallization from a small amount of alcohol;;

1: not given 2: ethanol View Scheme

in water shaking of an aq. soln. of K2(PtCl4) with S(C4H9)2 for 48 h; sucking off;; washing with H2O; drying at ambient temperature; extraction with petroleum ether; recrystallization of the residue from alcohol;;