306 
DR. KANE ON THE CHEMICAL HISTORY 
It was analysed as follows : — 
19-077 grains, ignited with carbonate of soda, gave 9’569 of metallic platinum, or 
50‘ 11 per cent., and then 22‘627 of chloride of silver, equivalent to 29 35 of chlorine 
in 100. 
21'963 grains gave, by ignition with oxide of copper, 6"745 of water, indicating 3'41 
of hydrogen per cent. 
Another portion dried at a higher temperature and similarly treated, gave 3'34 of 
hydrogen in 100. 
33-478 grains gave 14-8295 cubic inches of pure nitrogen at 30 barometer and 32 c 
Fahr., amounting to 14*21 per cent. 
The formula to which this analysis points is Pt 2 Cl 3 N 4 H 13 0 2 , from which the 
numbers follow : — 
Tw t o equivalents of platinum . 
197-6 
50-77 
Three equivalents of chlorine. 
106-2 
27-29 
Four equivalents of nitrogen . . 
56-4 
14-49 
Thirteen equivalents of hydrogen 
13-0 
3-34 
Two equivalents of oxygen . . 
16-0 
4*1 1 
389-2 
100-00 
The relation of this substance to that last described is easily to be seen ; it con- 
sists in the union of one equivalent of muriatic acid to two equivalents of Gros’s 
base. It wmuld, indeed, upon the principles of that chemist, stand in the singular 
position of an oxychloride of his compound radical, for it is evident that (Pt Cl N 2 
H 6 ) O T (Pt Cl N 2 H 6 ) Cl = Pt 2 Cl 3 N 4 H 12 0 + 2 aq. Evidently the manner of 
formation of this substance is the expulsion of ammonia from Gros’s base by the tem- 
perature of ebullition and the subsequent combination of the sal-ammoniac of the 
liquor with the body so evolved. Thus Pt 2 Cl 2 N 4 H 12 0 2 losing N H 3 becomes Pt 2 
Cl 2 N 3 H 9 0 2 , and by the addition of N II 4 Cl forms the body in question, Pt 2 Cl 3 N 4 
H 13 ^2* 
I have not hitherto stopped to consider the precise manner in which these several 
bodies are derived from each other, or from the chloride of platinum, and in order to 
see more clearly their natural relations, it is necessary to make the change already 
noticed in the commencement of this paper. Ammonia being amidide of hydrogen, 
and nothing occurring in the chain of reactions now studied to disturb its constitu- 
tion, I shall for the future look upon the nitrogen as existing in the state of amido- 
gene, and the formulee already described become then as follows : — 
A. Pt Cl 2 N H 3 = Pt Cl 2 + Ad H . 
B. Pt 2 CJ 5 N 2 H u 0 4 = Pt 2 Cl., Ad 2 H 7 0 4 
C. Pt 2 Cl N 3 H 10 0 4 = Pt 2 Cl Ad 3 H 4 G 4 
D. Pt Ci N 2 H 8 G 3 = Pt Cl Ad 2 H 4 O s 
E. Pt 2 Cl 3 N 4 H 13 0 2 = Pt 2 Cl 3 Ad 4 H 5 0 2 . 
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