Contributions to the history of the phosphorus-bases / by Augustus William Hofmann.
- August Wilhelm von Hofmann
- Date:
- 1861
Licence: Public Domain Mark
Credit: Contributions to the history of the phosphorus-bases / by Augustus William Hofmann. Source: Wellcome Collection.
Provider: This material has been provided by King’s College London. The original may be consulted at King’s College London.
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![Cj4 H34 As2 Br2 — (C2H4) L „(C2H5)3As- (C2H5)3AsJ yielded, when debrominated, the powerful alkali [(C2 H4)(C2 H5)6 As2] Br, C14 H36 As2 02 — Ho K Treated with acids, this alkali produces a series of fine salts, amongst which the di-iodide deserves to be mentioned; it equals in beauty the corresponding diphospho- nium-compound. I have fixed the composition of the series by the analysis of the platinum-salt and gold-salt. Platinum-salt.—Pale yellow crystalline precipitate, similar to the diphosphonium- compound, difficultly soluble in water, soluble in boiling concentrated hydrochloric acid, from which it crystallizes on cooling. I. 0-8610 grm. of platinum-salt (not recrystallized), treated with sulphuretted hydro- gen, &c., gave 0-2220 grm. of platinum. II. 0-4885 grm. of platinum-salt (crystallized from hydrochloric acid), analysed in the same manner, gave 0-1265 grm. of platinum. The formula ^14 H34 As2 Pt2 Cl6 — (C' TT V^» ^5)3 -^-s } 2 J(C2H5)3AsJ Cl2,2 Pt Cl2 requires the following values:— Theory. Experiment. a < < i I. II. 1 equiv. of Diarsonium . . 352-0 46-17 2 equivs. of Platinum. . . . 197-4 25-89 25-78 25-89 6 equivs. of Chlorine . . 213-0 27-94 1 equiv. of Platinum-salt . 762-4 100-00 Gold-salt.—The dichloride obtained after separating the platinum in the two preceding analyses by means of sulphuretted hydrogen, was precipitated by trichloride of gold. Yellow slightly crystalline precipitate, soluble in hydrochloric acid, from which it separates in golden-coloured plates. 0-5859 grm. of the salt, treated with sulphuretted hydrogen, &c., gave 0-2220 grm. of gold. The formula requires ^14 H34 As2 Au2 Clg — 1 equiv. of Diarsonium 2 equivs. of Gold . . 8 equivs. of Chlorine . 1 equiv. of Gold-salt . (C2HJ „(C2H5)3As- (C2 H5)3 As_ Cl2,2 Au Cl3 Theory. Experiment. A 1 352 34-18 394 38-25 37-89 284 27-57 . 1030 100-00](https://iiif.wellcomecollection.org/image/b21309024_0123.jp2/full/800%2C/0/default.jpg)
