hydrogenchloride; dihydrogen peroxide in water mixt. of hot aq. suspn. of Pt-complex with 30percent aq. H2O2 and concd. HCl was heated with stirring for 10-30 min at ca. 80°C; filtered, washed with cold water, dried under vac.;

tetraethylammonium chloride in acetonitrile Kinetics; reactn. of Pt- and Au-complexes in the presence of Et4NCl at 50°C, ionic strength 0.10 mol/dm**3 (Et4NClO4); followed spectrophotometrycally;