in hydrogen bromide aq. HBr; concd. HBr-soln.;;

in 3-methyl-1-butanol; water T=75°C; 10 h;

in water pptn. from an aq. cis-(Pt(NH3)2(NO3)2)-soln. with oxalic acid;;

Ag-oxalate in ammonia aq. ammonia=NH3; heating cis-(Pt(NH3)2Cl2) and Ag-oxalate with aq. NH3-soln.;;

in not given mixing of a cis-(Pt(NH3)2(NO3)2)-soln. with a great excess of concd. oxalic acid; heating on a water-bath for 1-2 h; pptn. at cooling down;;

in water

in not given treatment with excess K-oxalate;;

in ammonia byproducts: {Pt(NH3)4}C2O4, {Pt(NH3)4}{Pt(C2O4)2}; reactn. of Ca(Pt(C2O4)2)*8H2O with cold satd. NH3-soln.;;

in not given formation on neutralization of cis-(Pt(NH3)2(OH)2) with oxalic acid;;

in water; acetone byproducts: AgI, NaNO3; dissolving of cis-Pt(NH3)2I2 (1 mmol) in C3H6O, addn. of AgNO3 (2.2 mmol), stirring for 10-20 min, removal of ppt.(AgI), evapn. of filtrate, crystn. of Pt(NH3)2(ONO2)2 in Et2O, drying in vac., dissolving in H2O, addn. of Na2C2O4, stirring for 4-5 days; filtration, evapn. of filtrate to dryness, addn. of MeOH, filtration, washing with Et2O, drying in vac.;