Sodium platinate

Pivalic acid as reagent 13, 700 Platinate s. Sodium platinate Platinum (s. a. Chloroplatinic acid)... 

On reduction with sodium amalgam the acid adds on two atoms of hydrogen the resulting amorphous aeid yields a crystalline dimethyl ester, C2iH2gOgN2, colourless prisms, m.p. 143-7° dec.). On hydrogenation in presenee of platinic oxide as catalyst 2 mols, of hydrogen are absorbed to form the acid, CjgHjgOgNj, colourless prisms, [ajo - -17-7° (HjO). On oxidation with chromic acid the Cjg acid is converted into Wieland s Ci7 acid and Hanssen s Cjg acid. ... 

Cyan-kalium, n. potassium cyanide, -kalium-losung, /. potassium cyanide solution, -ko-balt, m. cobalt cyanide, -kohlensaure, / cyanocarbonic acid. -kupfer, n. copper cyanide, -laugerei, -laugung, /. cyaniding. cyanidation. -losung, / cyanide solution, -metall, n. metallic methyl cyanide, -natrium, n. sodium cyanide. -platin, n. platinum cyanide. 

Platinic oxide has been prepared previously by the interaction of platinic chloride and excess sodium hydroxide.4 Since the catalyst itself is platinum black, the other methods for its preparation are given below. 

The crystal structure of the sodium salt of 30 (NAMI) is shown in Fig. 9, where Na(I) bridges two molecules of 30 via oxygens of S-bound DMSO and water. This complex may be readily reduced in vivo (E1/2, -0.001 V) (166), whereas the bis-imidazole complex 28 has a lower redox potential and is more difficult to reduce. The reduction potential of 28 is strongly pH dependent (AE = —118 mV/pH unit near pH 7), reduction being more favorable at acidic pH values (167). This complex hydrolyses at a similar rate to cisplatin (ty ca. 3 h at 310 K) and, like cis-platin, aquation appears to be necessary for DNA binding (168). 

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

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... 

Hexammino-platinic Chloride, [Pt(NH3)8]Cl4, is produced by the addition of hydrochloric acid to a solution.of the carbonate in sodium carbonate. From the liquid colourless needles are gradually deposited. It is soluble in warm water and may be crystallised from aqueous solution. 

The chloride, [Pt(NH3)50H]Cl3.H20, crystallises in rhombic plates. The nitrate, [Pt(NH3)50H](N03)3, crystallises in needles. Both salts are soluble in water. The carbonate and the sulphate, like those of the hexammino- and the chloro-pentammino-series, are practically insoluble in water but soluble in sodium hydroxide. The chloride is easily reduced by zinc and hydrochloric acid, forming tetrammino-platinous chloride. ... 

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... 

Aqueous pools of reversed micelles have been fruitfully employed for the in situ generation of semiconductor particles. The first publication in this area described the formation of CdS in sodium bis(2-ethylhexyl)sulfosuccinate (AOT) aggregates in isooctane [611]. The preparation involved the addition of aqueous CdCl or Cd(N03)2 to isooctane solutions of AOT. Exposure to controlled ammeters of the CdS particles formed. Irradiation of degassed, AOT-reversed-micelle-entrapped, platinized CdS by visible light (450-W Xenon lamp X > 350 nm) in the presence of thiophenol (PhSH) resulted in sustained hydrogen formation. Sacrificial electron transfer occurred from thiophenol to positive holes in the colloidal CdS and, consequently, diminished undesirable electron-hole recombinations (Fig. 101) [611]. 

Platinic Arsenate has been obtained 4 as red crystals by treating a solution of the hydroxyarsenide, Pt(OH)As, in aqua regia with potassium chloroplatinate. It was described by Thomson5 as a pale brown precipitate obtained by double decomposition of sodium arsenate and platinic nitrate. 

Platinic Thioarsenate is obtained as a deep yellow precipitate when a solution of hydrochloroplatinic acid is treated with sodium ortho- or meta-thioarsenate.2... 

S. Koefed prepared apple-green crystals of platinous diamminonitritoehloro-nitrosylbydrochloride, Pt(NH3)2(N02)G.N0.HCl.fH20, by heating platinous tetramminodiehloride with sodium nitrite and dil. hydrochloric acid on a water-bath, and drying the product at 100°. The constitution of the salt without water of hydration, is represented ... 

Pt2(NH3)4(0H)Is.2(N0.HI).6H20. E. Koefed made bluish-green crystals of platinous dianuninodinitritonitrosylhydroohloride, Pt(NH3)2(N02)2.N0.HCl, by the action of sodium nitrite on platinous diamminodichloride. Its constitution was represented ... 

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