barium dihydroxide in water T=70°C;

sulfuric acid

1: cis-[Pt(NH3)2I2] With silver sulphate in water T=50°C; 24 h; 2: barium malonate in water T=40°C;

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 BaC3H2O4 to 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.;

1: Cis-[PtI2(CH3NH2)2] With silver sulphate in water T=50°C; 24 h; 2: barium malonate in water T=40°C;

1: [PtI2(en)] With silver sulphate in water T=50°C; 24 h; 2: barium malonate in water T=40°C;