Sodium chloroplatinate

Compounds Ammonium chloroplatinate sodium chloroplatinate platinic chloride platinum chloride sodium tetrachloroplatinate potassium tetrachloroplatinate ammonium tetrachloroplatinate sodium hexachloroplati-nate potassium hexachloroplatinate ammonium hexachloroplatinate... 

Hexammino-ehromic Nitrate, [Cr(NH3)6](N03)3, is obtained by the method described above.1 It crystallises in brilliant orange-yellow plates or prisms, is insoluble in alcohol and soluble in cold water, one part dissolving in forty parts of water the addition of soluble sulphates to the solution causes the precipitation of the less soluble nitrate-sulphate, [Cr(NH3)6](N03)(S04), which crystallises in glistening yellow octahedra. Sodium chloroplatinate added to an aqueous solution of the nitrate precipitates the nitrate-chloroplatinaie, [Cr(NH3)6](N03).(PtCl6).H20. 

Hexammino-ehromic Chloroplatinate, [Cr(NH3)8]2(PtCl6)3. GH20, is formed by the addition of sodium chloroplatinate to a neutral solution of hexammino-ehromic chloride. It is very sparingly soluble... 

The chloroplatinate, [Co(NH3)4(N02)2]2PtCls, is obtained by the addition of sodium chloroplatinate to an aqueous solution of the nitrate of the series. It separates in orange-brown prismatic crystals which are readily decomposed and therefore not easily crystallised without decomposition. 

The chloroplatinate, [Pt(NH3)4]PtCl6, is prepared by mixing a cold solution of sodium chloroplatinate with tetrammino-platinous chloride, when the salt separates as a yellow floeculent precipitate. It decomposes slowly at ordinary temperature and more rapidly on boiling, yielding the chloroplatinite.2... 

The chloroplatinate, [Pt(NH3)4Cl2]PtCl6, is obtained by mixing solutions of sodium chloroplatinate and dichloro-tetrammino-platinic nitrate, or by the prolonged action of chlorine on either the green salt of Magnus or the preceding salt suspended in -water. It crystallises in brilliant yellow prisms which are soluble in hot water. Hydrochloric and nitric acids precipitate the chloride and the nitrate respectively.2... 

A. D. Hel man, Reaction of Unsaturated Molecules with Sodium Chloroplatinate, Dokl. Akad. Nauk SSSR 31, 761-764 (1941). 

The test serves to identify potassium in presence of sodium. The metal is detected and estimated quantitatively by precipitation with chloro-platinic acid as potassium chloroplatinate, KaPtClg, or by conversion into perchlorate. The insolubility of these salts in alcohol facilitates the separation of potassium from sodium.1 Acetone has the advantage of dissolving both chloroplatinic acid and sodium chloroplatinate, but not the potassium salt.8 The metal is also estimated as sulphate, chloride, primary tartrate,3 and cobaltinitrite.4... 

The required conditions for adsorption on alumina are anionic precursors at a pH lower than eight or cationic precursors at a pH higher than eight. Adsorption of chloroplatinic acid fails into the first category and can take place even in an acidic medium. 3 Interaction of alumina with Pt(NH3)4(OH)2 and Pt(NH3)4Cl2 in ammonia fits in the second. A solution of sodium chloroplatinate is, however, not sufficiently acidic so the pH is higher than eight and anionic adsorption does not take place. ... 

Platinum—soluble salts (sodium chloroplatinate ammonium chloroplatinate, platinum tetrachloride) Sensitizers causing asthma and dermatitis. Metallic platinum does not share these effects. Soluble platinum compounds are also highly irritating to eyes, mucous membranes, and respiratory tract. 0.002 mg/m (as Pt) 4mg/m (as Pt) Appearance varies with the compound. Thermal-breakdown products of some chloride salts Include chlorine gas. Used as Industrial catalysts and In specialized photographic applications. 

Dibromo(l,5-cyclooctadiene)platiBuia(Il) [Pt(COD)Br2l [12145-48-1] M 463.1, m 220-278 (dec) can be obtained from sodium chloroplatinate hydrate (4g), diene (4ml) and LiBr (2g) in EtOH (80-100ml), kept at 20 for 2 days, and the precipitate is crystallised from AcOH (charcoal) in pale yellow needles. It is slightly more soluble than the chloro-analogue in organic solvents. [Chatt et al. J Chem Soc 2496 1957, Beilstein 5 IV 404 ]... 

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