Potassium trichloro

Potassium Trichloro-ammino-platinite, [Pt(NH3)Cl3]K.H20, is obtained by the interaction of potassium cliloroplatinite and tetra-ammi no -pi atinous chloride.3 It crystallises in orange-yellow orthorhombic prisms, is easily soluble in water and insoluble in alcohol. 

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. 

Electrolytic processes for the perchlorates.—F. von Stadion found that if an aq. soln. of chlorine dioxide be included in Volta s circuit, at first very little gas is developed, but after some hours, oxygen and chlorine appear at the anode, and hydrogen at the cathode. The volume of hydrogen so obtained is nearly twice that of the oxygen. After some time the soln. is decolorized, and transformed into perchloric acid. In 1857, A. Riche 18 prepared perchloric acid by the electrolysis of hydrochloric acid, or of an aq. soln. of chlorine and ten years earlier, H. Kolbe prepared potassium perchlorate by the electrolysis of an aq. soln. of potassium chloride—acidified with sulphuric acid—and of potassium trichloro-methyl-sulphonate. H. Kolbe (1846), a pioneer in the electrolytic preparation of compounds, specially noted that the formation of perchloric acid is always preceded by that of chloric acid, and stated ... 

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)platinum(II),6 Zeise s salt (2.00 g, 5.43 mmole), is placed in a 100-mL Erlenmeyer flask containing a magnetic stirrer, and 50 mL of water is added. The mixture is stirred until complete dissolution of the salt, whereupon 0.44 mL (5.46 mmole) of pyridine is added dropwise (syringe) with... 

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... 

C2H6CI3KOPt, Potassium trichloro(ethylene)platinatedi) monohydrate (Zeise s salt - P2j/c), 41B, 877 C2H7Br2NPt, cis-Amminedibromoethyleneplatinum(II), 29, 586 C3H8Cl3NPt, Trichloro(7r-allylammonium)platinum(lI), 43B, 1037 CftH8ClftPd2, trans-Di-/x chlorobis( 7r-ethylene)dichlorodipalladium(II), 19, 538... 

C12H2 2Cl3K02Pt, Potassium trichloro(3,6-diethyloct-4-yne-3,6-diol)-platinatedl), 39B, 586... 

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,... 

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