in water byproducts: AgI; Pt- and Ag-complex mixed together in water, stirred in dark for 2-3 d; ppt. filtered, filtrate evapd. to dryness;

1: NaOH / water 2: water View Scheme

in water byproducts: AgI, BaSO4; addn. of cis-Pt(NH3)2I2 (1 mmol) to aq. soln. of Ag2SO4 (0.98 mmol), stirring for 4 h in dark, removal of ppt. (AgI), slowly addn. of BaC10H8O4to filtrate (cis-(Pt(NH3)2(H2O)2)(SO4)), stirring for 20 min; filtration, evapn. of filtrate to dryness, addn. of MeOH, filtration, washing with Et2O, drying in vac.;