Platinate chloride

When platinum is dissolved in aqua regia it is first converted to platinic chloride, PtCl, and the latter at once unites with the excess of hydrochloric acid to give the stable soluble dibasic chloroplatinic acid, HjPtCle.f... 

It has been stated that the activity of the catalyst in low pressure hydrogenations is enhanced by the addition of small quantities of platinic chloride. 

The organic bases form, like ammonia, crystalline chloroplati-nates with platinic chloride of the general formula BoH,j,PtCl,). By estimating the amount of platinum present in the salt, it is possible to calculate the molecular weight of the platinum compound, and consequently that of the base. 

Dissolve about i gram of an organic base (brucine, strychnine, quinine, c.) in 10 c.c. of a mixture of equal volumes of concentrated hydrochloric acid and water. To the clear hot solution add excess of platinic chloride and let it cool. Yellow microscopic crystals of the chloroplatinate of the base separate. (If the chloroplatinate of the base is very soluble in water, such as aniline, it must be washed with strong hydrochloiic acid, pressed on a porous plate and dried in a vacuum-desiccator over solid caustic potash.)... 

Chlor-oxyd, n. chlorine oxide, -phosphor, m. phosphorus chloride, -pikrin, n. chloropicrin. -platin, n. platinic chloride, -platinsiiure,. chloroplatinic acid, -quecksilber, n. mercury chloride (either one), -raucherung, /. chlorine fumigation. 

Platini-, platinic, platini-, platinum (IV). -chlorid, n. platinic chloride, platinum (IV) chloride, -chlorwasserstoff, m., -chlorwasserstoffsaure, /. chloroplatinic acid, chloroplatinic (IV) acid, -cyanwasserstoffsaure, /. cyanoplatinic acid, cyanoplatinic(IV) acid, platinicyanic acid. 

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. 

Asalt of chloroplatinicacid. Also known as platinochloride., kl6r-o plat-3n,at) chloroplatinic acid inorg chem H2PtCl6 An acid obtained as red-brown deliquescent crystals used in chemical analysis. Also known as platinic chloride. kl6r-3-plo tin-ik as-3d ... 

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

Formula PtCE MW 336.89 also forms a pentahydrate, PtCE 5H2O Synonyms platinum(IV) chloride platinic chloride... 

The gaseous products formed on thermal decomposition of ethylene-platinous chloride are ethylene, hydrogen chloride, vinyl chloride, ethyl chloride, ethylene dichloride and ethylidine dichloride. The half life for the decomposition at 130° is 4.5 days, at 172° it is 1.7 hours 98). The hydrolysis of Zeisc s salt K[PtCl3(C2H4)] by water and dilute acids has been studied ... 

In contrast to palladium chloride, platinous chloride does not give a ir-allylic complex on heating with allyl alcohol instead, the diallyl ether complex [PtChi CsHsOCsHs)] is formed in good yield (105). 

This bonding to carbon atoms is again found in cyclopropane platinous chloride, which has recently been shown to contain a four-membered ring of three saturated carbon atoms and a platinum atom (la). The insolubility in noncoordinating media suggests that it is a polymer held together by... 

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. 

Ammino-derivatives of Auric Salts and Oxides.—Auric chloride, like platinic chloride, combines with hydrochloric acid and alkali chlorides with formation of ehlorauric acid, HAuC14, and alkali chlor-... 

Hexammino-cobaltous Chloride, [Co(NH3)6]C12, is the most stable of the three ammines of cobaltous chloride and may be prepared in aqueous solution. If ammonia gas be passed into a concentrated aqueous solution of cobaltous chloride the greenish precipitate at first formed dissolves in excess of ammonia in absence of air, giving a red solution. From the liquid, on standing, pale red octahedral crystals of pentammino-cobaltous chloride separate. The crystals are stable in absence of air but lose ammonia if kept over sulphuric acid. On heating to 120° C. the substance loses four molecules of ammonia and is transformed into diammino-cobaltous chloride. It is soluble in aqueous ammonia without decomposition and insoluble in alcohol. With platinous chloride it forms a double salt, [Co(NH3)3]PtCl4.3 Cobaltous... 

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... 

Dipropylenediamino-platinous Chloride, [Pt pn2]Cl2, crystallises in greyish-white leaflets, and is prepared by boiling a solution- of potassium chloroplatinite with propylenediamine under a reflux until the yellow precipitate first formed dissolves. 

Propylenediamino-diammino-platinous Chloride, [Pt(NH3)2 pn]Cl2, is produced by the cautious addition of ammonia to dichloro-propylenediamino-platinum, [PtpnClJ, suspended in boiling water. 

Diammino-1 -propylenediamino-platinous Chloride, [Pt(NII3)2 pn]Cl2, has rotation [a]u+25T7°, [M]d+94T4°. 

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