Hydrogen hexachloroplatinate

Hydrogen hexachloroplatinate(IV)-Copper(II) chloride, H2PtCl6-CuCl2. 

Hydrogen hexachloroplatinate(IV)-Diethoxymethylsilane, 76 Hydroxylation Osmium tetroxide, 186 Osmium tetroxide-N-Methylmorpho-line N-oxide, 222... 

Potassium nitrosodisulfonate, 258 other methods Bis(tributyltin) oxide, 41 /-Butyl hydroperoxide-Dichlorotris-(triphenylphosphine)rutheni-um(II), 54 Dibutyltin oxide, 95 Hydrogen hexachloroplatinate(IV)-Copper(II) chloride, 145 4-Methoxy-2,2,6,6-tetramethy 1-1 -oxopiperidinium chloride, 183 of alcohols to carboxylic acids Cetyltrimethylammonium permanganate, 69... 

Hydrogen hexachloroplatinate(IV)-Copper(II) chloride, 145 Lead tetraacetate-Manganese(II) acetate, 157... 

Platinum Compounds Hydrogen hexachloroplatinate(IV)-Copper(II) chloride, 145 Hydrogen hexachloroplatinate(IV)-Diethoxymethylsilane, 76 Platinum-Titanium, 251 Rhodium Compounds [2,2 -Bis(diphenylphosphine)-l,T-binaphthyl](dimethanol)rhodium(I) perchlorate, 36... 

HEXACHLOROPLATINIC(4+) ACID, HYDROGEN- HYDROGEN HEXACHLOROPLATINATE(4+) PLATINIC CHLORIDE... 

Synthesis. Synthesis of the copolymers was performed by a hydrosilylation reaction of poly(dimethylsiloxane-co-methylhydrosiloxane) (Petrarch System, Inc.) and a-olefins of various lengths (Aldrich). A round-bottomed flask equipped with a magnetic stirring bar, condenser, and calcium chloride tube was charged with a 50% solution of the reactants (up to 10% molar excess of a-olefin) in dry toluene. A solution of hydrogen hexachloroplatinate(IV) in diglyme-isopropyl alcohol (150 ppm Pt) was then added to the reaction mixture. The reaction mixture was stirred at 60 °C for 3 h. At the end of this period, the mixture was refluxed with activated charcoal for 1 h and filtered while hot. Finally the solvent and excess a-olefins were removed under reduced pressure (67 Pa at 100 °C). The reaction proceeded to completion as evidenced by the absence of the Si-H absorption at 2130 cm" in the IR spectra. Residual a-olefin in the purified polymers was determined by gas-liquid chromatography. In all polymers, residual a-olefin was less than 1.5 wt %. 

The catalyst, hydrogen hexachloroplatinate IV) hydrate, (H2PtCl6) may be used in the hydrosilylation reaction. If this catalyst is used then the reaction mixture must be left stirring at 60-70X overnight. Sometimes a trace amount of colloidal platinum may be present in the side-chain liquid crystal cyclic siloxane tetramer. This can be removed by adding a small amount of triphenylphosphine (0.1 g) at step 11. 

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

Platinic Chloride. Hydrogen hexachloroplatinate-(IV) acid platinic chloride hexacbloroplatinicCI V) acid chloroplatinic acid. Cl HjPt mol wt 409.80. Cl 51.90%, H 0.49%, Pi 47.61%. H.FtCl, Exists as hexahydrate. 

Such polymerization can be avoided by using a catalyst composed of a Group VIII metal or a derivative thereof, e.g., platinum (as platinum black or platinized asbestos or charcoal), hydrogen hexachloroplatinate, or ruthenium chloride then the 1 1 adducts can be obtained in good yield from olefins such as styrene, acrylonitrile, and methacrylic esters with, e.g., dichloro(methyl)-silane 347-349 nevertheless it is advantageous to exclude oxygen and add a polymerization inhibitor such as te/7-butylpyrocatechol or 2,6-di-terf-butyl-4-methylphenol. 

Silanes can also be added to acetylenes, alkylacetylenes, acetylenic alcohols and their derivatives, etc., under conditions very similar to those effective with olefins, i.e.9 at high temperatures,367 with catalysis by peroxides,339,368 or in the presence of platinum361,369 or hydrogen hexachloroplatinate 370 palladium has proved a particularly effective catalyst for this reaction with acetylenes.371 The corresponding vinylsilicon compounds are formed, e.g. ... 

In order to obtain Au/Pt nanoparticle-covered BCN nanotube brushes, the nanotubes obtained by the template method described earlier were soaked in 2 mL of 5 mM aqueous solutions of hydrogen hexachloroplatinate (IV) or hydrogen tetrachloroaurate (III) for 12 h. The nanotubes were washed with distilled water twice followed by a washing with 10 mM sodium borohydride solution before drying at 40 °C for an hour. The resulting products were examined by electron microscopy. 

For the investigation the oxygenated liquid fuels in half-cells, chemically prepared Pt-Sn (0.5 mg cm 8% Sn) and R-Ru (0.5 mg cm 50% Ru) electrodes supported on gas-diffusion type Vulcan XC-72/Toray paper were obtained from ETEK Inc. These electrodes generally have 15-20% PTFE content in the electrocatalytic layer. The electrochemically prepared electrodes consisted of electro-depositing R-Sn and R-Ru from an acid solution of hydrogen hexachloroplatinate(IV), tin(IV)chloride, and potassium pentachloro-aquoruthenate. 

Silicon tetrachloride (Aldrich, 99.998%), allylamine (Aldrich, 99.8%), lithium aluminum hydride solution (1.0M in tetrahydrofuran, Aldrich), toluene (Aldrich, 99.8%, dehydrated), methanol (Aldrich, 99%), hydrogen hexachloroplatinate (Aldrich, 99.995%), isopropyl alcohol (Aldrich, 99.5%, anhydrous), sodium boro-hydride (Fluka) and tetraoctylammonium bromide (TOAB) (Sigma, 99%) were purchased from Sigma-Aldrich and used without further purification. 

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... 

In a later work, Robinson et al. [231 ] prepared Pt particles by in situ reduction at 25°C of hydrogen hexachloroplatinate (IV) with hydrazine in a reverse micelle system water/NaAOT/n-heptane. The mean particle radius was found to vary from 8.4 nm to 1.5 nm under a variety of conditions. The mean size was found to decrease with increase in the molar ratio [N2H4]/[H2PtCl6]. 

Syntheses The platinum colloids were prepared according to the method described by H. Hirai, N. Toshima, et aL (5- ). Hydrogen hexachloroplatinate H2PtCl2 was reduced by refluxing alcoholic solutions containing the dissolved polymers, including polyelectrolytes. Mass ratios of polymer platinum = 10 1 and 25 1 were enq>loyed. The H2PtCl and the pofymers were obtained fi om Aldrich and Polysciences, respectively. 

Preparative Methods treatment of trichlorosilane with 3-methylbut-2-en-l-ylmagnesium chloride followed by methylmagnesium bromide (2 equiv) provides (aja-dimethyl-allyl)dimethylsilane (bp 108 °C) in 76% yield with 99% isomeric purity. The hydrosilane is converted to the ethoxysi-lane quantitatively by the reaction with ethanol catalyzed by hydrogen hexachloroplatinate(IV), and then fluorinated in situ with tetrafluoroboric acid to give the fluorosilane in 87% yield. The latter is methylated with a small excess of methyllithium to give (Q, Q -dimethylallyl)trimethylsilane in 96% yield. Alternatively, (a,Q -dimethylallyl)trimethylsilane can be prepared from 3-methylbut-l-yn-3-ol in six steps. ... 

M. P. Sibi, Hydrogen Hexachloroplatinate(IV) in the Encyclopedia of Reagents for Organic Synthesis,Wiley, Hoboken, NJ, 2007... 

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