Hexachlor-rhodites

Triethylenediamino-rhodium Chloride, [Rh en3]CI3.2 -H20, is formed by the interaction of ethylenediamine monohydrate and sodium hexachlor-rhodite thus ... 

Although cobalt chloride can unite with other chlorides to form double salts, no well-defined series of such salts exists. Rhodium and iridium trichlorides yield hexachlor-rhodites and hexaclilor-iridites respectively, of general formulas M3RhCl8 and M3IrCl8. These are isomorphous, and are analogous in constitution to the hexachlor-osmites, M3OsCle. 

Potassium Hexachlor-rhodite, Iv3RhCl6. Aq., was stated by Claus 2 to be formed on dissolving the hydrated sesquioxide in hydrochloric acid and adding a concentrated solution of potassium chloride. The yellow, acid solution becomes gradually red in colour, and in the course of a few weeks dark red, efflorescent crystals separate out. These were found to contain six molecules of water, of which three were readily lost on exposure to air. 

Ammonium Hexachlor-rhodite, 2(NH4)3RhCl6.3H20, may be prepared by mixing solutions of rhodium trichloride and ammonium chloride, the latter in excess. On slow evaporation in the cold, long red needles crystallise out.1... 

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