Platinate, trichloro potassium

Potassium Pentachloro - ammino - platinate, [Pt(NH3)Cl5] K.H20, is produced by treating potassium trichloro-ammino-platinite, [Pt(NH3)Cl3]K, with chlorine. It separates in yellowish triclinic crystals. 

The method of direct (immediate) interaction of reactants is widely used for obtaining complexes with multicenter coordination bonds (71-complexes). Using it, some methods to prepare ethylene complexes have been elaborated. Thus, the interaction of ethylene with chloroplatinatodipotassium in the presence of SnCl2 2H20 in nitrogen atmosphere (3.60) yields monohydrate of potassium trichloro (r -ethylene)platinate(II) (salt of Zeise) [11] ... 

Potassium Trichloro(ethylene)platinate(II), K PtCl3(C2H4) 159 ... 

Potassium trichloro(ethylene)platinate (2.00 g, 5.43 mmol) is dissolved in water (50 mL) and pyridine (0.44 mL. 5.46 mmol) is added dropwise by means of a syringe with stirring. A yellow precipitate forms immediately and the mixture is allowed to stir for 30 min. The precipitate is collected by filtration, washed with water (10 mL x 3), and dried in vacuo overnight (1.82 g. 90" n). 

Potassium trichloro(ethene)platinate(l-) K[Pt(C2H4)Cl3] (Zeise s salt) 70... 

This is about 100% in excess of the theoretical quantity required for precipitating all of the potassium in potassium trichloro(ethylene)platinic(II) acid as the chloride. 

Potassium trichloro(ethylene)platinate(II) 1-hydrate can be isolated in about a 7-g. quantity by cooling to 0° the yellow aqueous solution obtained from flask A (Fig. 18) after absorption of ethylene is complete. Tetraehloro-(dipropylene)diplatinum(II) can be prepared by the same procedure used for the ethylene compound except that twice the time of shaking is needed for propylene absorption and that final evaporations must be carried out below 40°.6... 

The field of organometallic chemistry, concerned with compounds involving metal-carbon bonds, has also expanded enormously since the 1940s. Mention has already been made of Grignard reagents (Chapter 10) and the zinc alkyls discovered by Frankland (Chapter 8). Predating Frankland s work was the discovery in 1827 by William Christopher Zeise (1789-1847) of the salt which was for many years named after him and is now known as potassium trichloro-(ethylene)platinate(ll) monohydrate (Figure 12.13). Many other platinum-alkene... 

Figure 12.13 Potassium trichloro(ethylene)platinate(n) monohydrate (Zeise s salt)...

C2HftCl3KPt, Potassium trichloro(ethylene)platinate(II), 43B, 1037 C2HgBr3KOPt, Potassium tribromo(ethylene)platinate(II) monohydrate, 30B, 292... 

C2H6Cl3KOPtS, Potassium trichloro(dimethyl sulfoxide)platinate(II), 42B, 930... 

Potassium trichloro(ethene)platinate(II), also known as Zeise s salt, has the formula K[PtCl3(C2H4)]H20 and contains rj -ethylene ligand. The compound is a yeUow-coloured coordination complex that is stable in air. The platinum atom has a square planar geometry. While reacting K2PtCl4 with ethanol in 1827, a Danish chemist Zeise synthesized this metal olefin complex containing a platinum-bound ethylene moiety, which incidentally represented the first metal—olefin complex. 

Potassium trichloro(ethylene)platinate(l-) monohydrate (1.55 g, 4.0 mmole) [Inorg. Synth., 14, 90 (1973)] and 10 mL methanol are placed in a counter-current of nitrogen in a 25-mL Schlenk-type fiask containing a magnetic stirring bar. The mixture is stirred to dissolve the Zeise s salt and cooled with an ice-water bath. Then -tetraethyl-1,2-ethanediamine (Fluka A.G., Buchs,... 

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... 

PtCl3KC2H , Platinate(II), trichloro-(etheneK potassium, 28 349 PtCl4N4C4Hi, Platinum(IV),... 

OBHIN7WC18H24, Tungsten(II), (acetonitrile-K A, C)carbonyliodo[tris-(3,5-dimethylpyr-azolyl)hydroborato]-, 33 226 OCl2NPtSC4H9, Platinum(II), dichloro(acetoni-trile)(dimethylsulfoxide)-, cis-, 33 192 OCl3KPtSC2H5, Platinate(II), trichloro(di-methylsulfoxide)-, potassium, 33 191 OCl6Fe2N2Ci6H4o, Ferrate(3-), /i-oxo-hexa-chlorodi-, bis(tetraethylammonium),... 

PtCl3KOSC2H6, Platinate(II), trichloro(di-methylsulfoxide)-, potassium, 33 191 PlFeOioSeC 10H24, Platinum(ll), tetrakis(di-methylsulfoxide)-, bis(trifluoromethanesul-fonate), 33 194... 

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