Volume 1

Fownes' manual of chemistry : theoretical and practical / [George Fownes].

  • Fownes, George, 1815-1849.
Date:
1877
Catalogue details

Licence: Public Domain Mark

Credit: Fownes' manual of chemistry : theoretical and practical / [George Fownes]. Source: Wellcome Collection.

    531/586 (page 513)
    Platinodiammoniura compounds, 9. Diplatinammoniimi compounds, 10. Diplatosodiammonium compounds, 11. Diplatinodiammonium compounds, 12. Diplatinotetradiammonium compounds, RPt ^ RPt <(j NH3R NH3R NH3R NH3R Pt—NH2(NH4)R Pt—NH^CNHJR RgPt—NH2(NH4)R R^it—NH2(NH4)R j^p /NH,(NHOR ■^Y\NH2(NH,)R j^j] /NH,(NH,)R We shall liere describe the most characteristic compounds of each group, referring for more complete description to larger works.* 1. Platosamvionium Compounds.—These compounds are formed by abstraction of the elements of ammonia, NH3, from the cor- responding platosodiammonium-compoimds. Tliey are for the most part insoluble in water, but dissolve in ammonia, reproducing the platosodiammonium-compounds. They detonate when heated. The chloride, or NgHgPtClj, is formed by heating platosodiammonium chloride to 220°-270°, or by heating the same salt with hydrochloric acid, or by boiling the green salt of Magnus (p. 515) with nitrate or sulphate of ammonium, and is deposited as a yellow crystalline powder, or in rhombohedral scales. It dis- solves in 4472 parts of water at 0° and in 130 parts of boiling water. At 270° it decomposes in the manner represented by the equation, SNaHgPtCla = 3Pt -f- 4NH4C1 -1- 2HC1 + N^. Silver nitrate added to its solution throws down all the chlorine. This salt is isomeric with the green salt of Magnus, with the yellow chloride of platosemidiammonium, and with the chloroplatinite of platosomonodiammonium. The corresponding iodide, NgHoPtl,, is a yellow powder, obtained by heating the aciueous sohition of the compouncl, N^HijPtlg. It dissolves in ammonia,-reproducing the latter compound. The oxide, * See Watts's Dictionary of Chemistry, iv. 673, and 2d Suppl. 992. F0WNE8.—VOL. I. 2 K