(>N AMMONIACAL PLATINUM B ÅSES. 77 



D. Compounds of the radicle Pt{^!f 3 c =R. 



1. Chloride, RCL, was obtained by boiling the chloride of platosemidiammine 

 with water and aniline. After soine time the chloride is dissolved and b} 7 the evapo- 

 ration of the solution in the water-bath, a dark vi ölet sirup remains. It was treated 

 with alcohol, which dissolved the resinous colouring raatter and left a whitish powder, 

 which was washed with alcohol. The powder was afterwards dissolved in hot water 

 and the filtered solution left to crystallise, when volurainous and colourless crystals 

 were obtained. 



The chloride was dried at 100° and subjected to the following analyses. 



a. 0,3117 gr. gave 0,1557 gr. platinum and 0,2248 gr. chloride^ of silver =0,0556 gr. 

 chlorine. 



b. 0,2480 gr. gave 21 C. C. nitrogen (teinp. of the water 17°. Bar. 758 t. 17°) = 

 0,0242 gr. nitrogen. 



c. 0,3600 gr. gave 0,2400 gr. carbonic acid =0,0654 gr. carbon and 0,1 150 gr. water 

 = 0,0128 gr. hydrogen. 



The formula requires: 



Theory Experiment 



a b c 



Platinum 197,88—49,99 49,95 — 



Chlorine 70,92 — 17,92 17,84 — — 



Nitrogen 42,oo — 10,62 — 9,79 — 



Carbon 72,oo — 18,19 — — 18,17 



Hydrogen 13,oo — 3,28 — — 3,55 



395,80 100,oo 99,30 



If the solution of the chloride is mixed with iodide of potassium a strong smell 

 of ammonia is discerned and a yellow powder precipitated. This precipitate is the 



iodide P^cl.i. 



2. Chloroplatinite, 2RCL+PtCL. On mixing the solution of the chloride with a 

 solution of chloroplatinite of potassium the double chloride is immediately thrown down 

 in thin, bronze-coloured, shining scales. 



Analysis: the double chloride dried at 100°. 



a. 0,3185 gr. gave 0,1755 gr. platinum and 0,2575 gr. chloride of silver =0,0637 gr. 

 chlorine. 



b. 0,3325 gr. gave 0,i77o gr. carbonic acid =0,0483 gr. carbon and 0,i»850 gr. water 

 = 0,0094 gr. hydrogen. 



The formula requires: 



