16 r. T. cl eve, 



The reactions of the chloride of platosammine are as follows: 

 Ammonia dissolves the chloride easily by boiling and gives the chloride of plato- 

 diamraine. 



Aniline and Etkylamine give the 



11 -i o+ |NH 3 -~NC 6 H ; l n , , D , INH 3 ~NC 2 H 7 1 p , 



chlondes Pt{ NH ^ Nc ; H ;)CLandPt{ NH ^ NC r HT f CL 



Nitric acid dissolves the chloride when heated with it and gives red vapours. 

 The yellow solntion thus obtained deposits, in cooling, yellow crystals of unknoAvn 

 composition. 



Chlorine or a mixture of muriatic and nitric acids, or also chlorate of potassium 

 and muriatic acid, gives small bright lemon-coloured quadratic octahedrons of the chlo- 

 ride of platindiammine. 



lodine with the chloride of platosammine gives a blaek powder, which consist* 

 of a mixture of the iodide and chloride of platinammine. Bromine acts in a similar 

 manner and gives a mixture of the bromide and chloride of platinammine. 



Nitrate of silver precipitates chloride of silver, but not instantly the whole quan- 

 tity of chlorine; slight traces of chlorine always remain in the solntion. If one mole- 

 cule of the chloride is precipitated with only one eqvivalent of the nitrate, the solution 

 deposits, when cooled, first a precipitate of the chloride and, by evaporation, the ni- 

 trate of platosammine. 



Cyanide of potassium in excess dissolves the chloride, einitting a strong smell of 

 ammonia, and gives by evaporation needles of platocyanide of potassium with a splen- 

 did blue fluorescence. 



2. Bromide R Br 2 . A solution of the bromide of potassium produces, immediately, 

 in a solution of the nitrate of platosammine a light-yellow precipitate of short micro- 

 scopical needles. The bromide in its dry state is an almost white powder. It is very 

 little soluble in hot water, which assumes a yellow colour, and it recrystallises on the 

 cooling of the solution. 



Analysis of the bromide dried at 100°. 



O,i507 gr. gave 0,2283 gr. metallic platinum and 0,4308 gr. bromide of silver 

 — 0,1833 gr. bromine 



Found Theory 



Platinum 50,g:> 197,ss — 50,5!) 



Bromine 40,(57 160,oo — 40,83 



Ammonia — 34, oo — — 



391,88 



3. Iodide R L was obtained by Reiset by boiling the solution of the iodide of 

 platodiammine l ) when ammonia was evolved and the iodide deposed as a bright yellow 

 powder. 



x ) Reiset Ann de Ch. et de Phys (3) 11 (1844) p. 425. 



