Platinate, chloro

Platin Chloro-(t 4-1,5-hexadien)-(2.3.5.6-tetrafluoro-phenyl)-Eltlb,. 426 (Cl -> C6HF4)... 

Molecular Weight of a Base by Analysis of its Chloro-platinate. 

Method- 3. From platinum metal or platinum residues. Dissolve the platinum metal or platinum residues in aqua regia, evaporate just to dryness several times with concentrated hydrochloric acid, dissolve the final residue in a httle water and precipitate as ammonium chloro-platinate with excess of saturated ammonium chloride solution. Filter and dry the precipitate at 100°. Then proceed according to Method 1. 

A few examples will illustrate the use of those terms. Chloro-pentammino-cobaitic chloride is written as [Co(NII3)5.Cl]Cl2, nitrito-aquo-tetrammino-eobaltic chloride as [Co(N I3) (NH3),(N02).n20 (. l2, and chloro-aquo-tetrammino-eobaltic chloride as [Co(NI13)4C1(1120)JC1 2. It will be observed that the co-ordination number in each of the complexes is six, and this is characteristic not only of cobalt-ammines, but also of many other complexes. Some metals, however, yield complexes with co-ordination number four. For example, tetrammino-cuprio sulphate, [Cu(NH3)1]S04, and tctrammino-platinous chloride, [Pt(NH3)4]Cl2, belong to this class. On the other hand, the co-ordinatioi i number of hexannnino-platinic chloride, [Pt(NIl3)0]Cl. is six, but the central metallic atom is tetravalent, hence there are four chlorine atoms in the outer dissociable zone. 

Chloro-triammino-platinous Chloride, [Pt(NH3)3Cl]Cl, may be obtained by the addition of ammonia to dichloro-diammino-platinum, [Pt(NH3)2Cl2], or by the elimination of ammonia from tetrammino-platinous chloride by the action of hydrochloric acid thus ... 

Chloro-triammino-platinous Sulphate, [Pt(NH3)3Cl]S04, is obtained by treating the chloroplatinite with silver sulphate. It crystallises in colourless needles which are sparingly soluble in cold water but soluble in boiling water. 

Hydrocliloric acid slowly transforms it into potassium chloropiatinite, and ammonia into dichloro-diammino-platinuni, chloro-triammino-platinous chloride, and tetrammino-platinous chloride. Chlorine oxidises it, forming the corresponding salt of the platinic series. 

In the annnino-platinous compounds there is, as in the other amniino-metallic compounds, a complete transition series from tetrammino-platinous salt to tetra-acido-platinous salt for example, tetrammino-platinous chloride, [Pt(NH3)JC12, chloro-triammino-platinous chloride, [Pt(NH3)3Cl]Cl, dichloro-diammino-platinum, [Pt(NH3)2Cl2], trichloro-ammino-platinous salt, [Pt(NH3)Cl3]K, and potassium chloropiatinite, [PtCl6]K2, where all the ammonia is replaced by chlorine. Comparing the molecular conductivities, the first-mentioned compound has conductivity at 1000 litres dilution of 260, the next 115-8 in the third compound the conductivity drops almost to zero, the fourth has conductivity of 106-8, and the last salt has conductivity of 267.2... 

These are represented by the chloro-pentammino-platinic salts. This series is difficult to prepare, but the chloro-deriva tives may be obtained by the action of liquid ammonia on ammonium chloro-platinate, [PtCl6](NH4)2, in absence of water in a sealed tube at ordinary temperature. 

Chloro - pentammino - platinic Chloride, [Pt(NH3)8CI]Cl3, is produced along with hexammino-platinic chloride by the action of liquid ammonia on ammonium chloroplatinate in a closed tube, keeping the materials dry. The mixture of the two platinic derivatives is separated by crystallisation, as the chloro-pentammino-derivative is more soluble in water than the hexammino-derivative. 

Chloro -pentammino - platinic Nitrate, [Pt(NH3)sCl](NOs)s, is formed by treating the chloride with concentrated nitric acid. It is less soluble than the chloride, and silver nitrate does not remove chlorine from it even on boiling. 

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 mixed salt, chloro-bromo-tetrammino-platinic chloride, [Pt(NH3)4ClBr]Cl2, separates as a yellow powder which is almost insoluble in water on the addition of hydrochloric acid to bromo-hydroxo-tetrammino-platinie nitrate, [Pt(NH3)4Br(0H)]("N03)a. 

Di-iodo-tetrammino-platinic Iodide, [Pt(NH3)4I2]I2, is formed by adding excess of potassium iodide to a solution of di chloro- or di-iodo-tetrammino-platinic nitrate. It gradually loses iodine when mixed with a solution of silver nitrate. Ammonia transforms it into a yellow crystalline powder, which appears to be a derivative of a diplatinic salt.1... 

Chloro - nitrato - tetrammino - platinic Sulphate, [Pt(NH3)4 C1(N03)]S04.H20, is obtained by dissolving chloro-nitrato-tetrammino-platinic nitrate in concentrated sulphuric acid and diluting with water. It crystallises in small prisms. 

Hydroxo - chloro - tetrammino - platinic Nitrate, [Pt(NH3)4 (0H)C1](N03)2, was first obtained by Raewsky 3 by the action of excess of nitric acid on the green salt of Magnus hence it is referred to as the nitrate of Raewsky. 

Platin Bis-[d phenyl-methyl-phosphan]-chloro-trifluoro-mcthyl- XII l/9a, 710 (FjC-CO-PtLj-CI, A)... 

Platin Bis-[diphcnyl-melhyl-phos-phan]-chloro-lrifluoroacetyl-Xlll/9a. 798 (F3c-ro-ci + Pii.4)... 

Platin Bis-[diphenyl-methyl-phos-phan]-chloro-pcntafluoroethyl-XIII/9a. 710... 

If the color of flame.is. violet, the salt is fairly pure(Ref l,p 141 Ref 3,p 862). K can be identified by pptg it as K2NaCo(N02)g, as well as by potassium salts of chloro-platinate, perchlorate) acid tartrate, picrate, silicofluoride, etc(Ref 3,p 862). Various quantitative methods for detn of K ion are given in Refs 3,4,4a 8... 

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