Platinate, chloro -, chloride

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 ... 

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... 

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. 

Hydroxo - chloro - tetrammino - platinic Chloride, [Pt(NH3)4 (0H)C1]C12, is precipitated in crystalline form by the addition of ammonium chloride to a solution of the nitrate. 

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... 

Cocaine.— This narcotic alkaloid, having the formula C17H21NO4, is found in the leaves of Erythroxylon Coca and E. Truxillense. If sections of these leaves are prepared in the same manner as indicated for those containing Caffeine, but platinum chloride solution substituted for that of gold chloride, large feathers or plumes of cocaine-chloro-platinate will be seen separating. 

Ammonia forms complex derivatives with all three classes of iridium compounds. When added to iridious chloride, IrCl2, or to iridic chloride, IrCl4, the complex salts formed are analogous to the series of platinous and platinic ammine derivatives. When ammonia is added to the trichloride, many complex derivatives are formed which are similar to rhodic, cobaltic, and chromic compounds. For example, when ammonia acts upon ammonium iridiochloride a compound is produced having the formula [Cl(NHj)5lr]Cl2, and called chloro-pentammine-iridium dichloride. 

PtCIH,N304, Platinum(Il), diammineaqua-chloro-. Irons-, nitrate, 22 125 PtCI 30Cs2N4C4, Platinate, tetracyano-, cesium chloride (1 2 0.30), 21 142 PtCl03oN4Rb2C4 - 3H2Ot Platinate, tetracyano-, rubidium chloride (1 2 0.30), trihydrate, 21 145... 

In this synthesis tetrabutylammonium trichloro (dimethyl sulfide) platinate(II) is prepared by the reaction of di-jt-chloro-dichlorobis (dimethyl sulfide) diplatinum (II) with tetrabutylammonium chloride by a modification of the method of Goggin et al.1... 

Chloro Platin Semi Diamine Chloride Cl3Pt(NH3)2Cl 0.33 1.54 ... 

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