Dihydrogen hexachloroplatinate

Commercial dihydrogen hexachloroplatinate(lV) of high purity is now readily available (for a platinum assay of 40.0%, x is 2.32 in the above equation). The acid, 10 g, is spread into a thin layer less than 5-mm thick in a combustion boat and a steady air purge is maintained (200 mL/min) through a combustion tube of approximately 1 L in volume. The temperature of the furnace is raised from 25 to 350° in 50° steps over a period of 3 hours. The temperature is held at 350° for 0.5 hours. The sample can then be removed from the furnace and stored in a desiccator. The yield is quantitative based on the Pt assay of the dihydrogen hexachloroplatinate(IV) used (>98% ). 

SYNS CHLOROPLATINIC(TV) ACID DIHYDROGEK HEXACHLOROPLATINATE DIHYDROGEN HEXACHLOROPLATINATE(2-) HEXACHLORO-PLATINICACID HEXACHLOROPLATINIC(IV) ACID... 

The formation of salts with melamine (1.3,5-triazine-2,4,6-triamine) is the most extensively studied reaction of this type. In most cases, melamine acts as a monoacidic base and forms salts with mineral acids, e.g. hydrochloric acid, nitric acid or sulfuric acid, inorganic complexes, e.g. hydrogen tetrachloroaurate(III) or dihydrogen hexachloroplatinate(IV) and a large variety of organic acids, e.g. acetic acid, oxalic acid, picric acid or some sulfonic acids.30... 

DIHYDROGEN HEXACHLOROPLATINATE or DIHYDROGEN HEXACHLORO-PLATINATE(2-) (16941-12-1) Incompatible with sulfuric acid, caustics, ammonia, aliphatic amines, alkanolamines, amides, organic anhydrides, bromine trifluoride, isocyanates, vinyl acetate, alkylene oxides, epichlorohydrin. 

The method described here, which involves the aqueous reduction of dihydrogen hexachloroplatinate(2 -) with sodium tetrahydroborate (1 — ), results in platinum particles having a size of 28 11 A. 

Synonyms Chloroplatinic (IV) acid Dihydrogen hexachloroplatinate Dihydrogen hexachloroplatinate (2-) Hexachloroplatinic acid Hexachloroplatinic (IV) acid Hexachloroplatinic (4+) acid, hydrogen- Hydrogen hexachloroplatinate (IV) Hydrogen hexachloroplatinate (4+) Platinate (2-), hexachloro-, dihydrogen Platinic chloride Platinum chloride Speier s catalyst Empirical CUPe 2H Formula H2PtCl6... 

Dihydrogen borato) phenylmercury. See Phenylmercuric borate Dihydrogen (ethyl) [4-[4-[ethyl (3-sulfonatobenzyl) amino] (4-hydroxy-2-sulfonatobenzhydrylidene] cyclohexa-2,5-dien-1-ylidene] (3-sulfonatobenzyl) ammonium, disodium salt. See Fast green FCF Dihydrogen hexachloroplatinate Dihydrogen hexachloroplatinate (2-). See Chloroplatinic acid... 

Stable platinum colloids were prepared by reducing dihydrogen hexachloroplatinate H2PtCl in the presence of protective polymers. In this chapter, we report the results for several nonionic polymers and cationic polyelectrolytes and their ability to stabilize such platinum colloids. The sizes of the platinum particles were investigated by transmission electron microscopy (TEM) and found to be in the nanometer size range. The catalytic activity of these systems was tested by the hydrogenation of cyclohexene, dsp-cyclooctene, and 1-hexene. A variety of polymer-protected platinum nanoparticles showed catalytic activity, and conversions of 100 % were obtained in most cases. 

Tetrahydrohumulone (5, fig. 2) (see 3.2.) is hydrogenated with Adams catalyst and dihydrogen hexachloroplatinate (26). The main reaction product, isolated by column chromatography and recrystallized from iso-octane, is 4-(3-methylbutanoyl)-2,6-bis(3-methylbutyl)resorcinol (melting point 70-70.5°C) (6, Fig. 2). 

To tetrahydrohumulone (1 g 2.73 x 10r mol) in methanol (20 ml) are added 5% platinum(IV) oxide (Adams catalyst) and 2% platinum as dihydrogen hexachloroplatinate. After complete hydrogenation (5 mols H2) the solvent is removeo and the residue is separated by chromatography on silica gei with benzene as eluent. Recrystallization from iso-octane yields white crystalline 4-(3-methyibutanoyl)-2,6-bis(3-methylbutyl)-resorcinol (35-40%). 

Upon hydrogenation of humulinic acid C using platinum on carbon as catalyst in the presence of dihydrogen hexachloroplatinate, deoxohumulinic acid C or 7-(3-methylbutyl)-8-hydroxy-3,3-dimethyl-2-oxaspirobicyclo[4.4]7-nonen-6-one (129, Fig. 64) is formed (22,43). It is isolated by CCD in the two-phase system ether aqueous buffer pH 7.2 after 350 transfers, as a white crystalline substance with... 

Finally, the humulinic acids (2 g 7.52 x 10 mol) may also be hydrogenated in acetic acid (10 ml), to which 5% platinum(IV) oxide and 2% platinum as dihydrogen hexachloroplatinate are added. The hydrogenolysis occurs at 55°C and after the usual work-up the mixture is separated by CCD in the two-phase system ether aqueous buffer pH 7.75. Compound 142 is isolated from the band with K 12.0. 

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