1863.] 391 



of small crystalline needles. This salt contains water of crystalliza- 

 tion, which it does not lose even at 150. Dried respectively at 

 110, 120, 130, and 150, it invariably exhibited the composition 



C 24 H^ N 2 O, Pt 2 C1 6 = 2 [C 12 H u N, HC1, Pt Cl a ] + H 2 O. 

 The interpretation of the formula 



CJJJX, 



established by these well-concordant analyses, appeared to present 

 no difficulties. The origin of the compound, although uncertain, is 

 surrounded by phenylic associations ; and nothing, in fact, could 

 have been more natural than to consider the new base as diphenyl- 



amine, 



C.H. 

 C U H U N=C.H,N; 



this view, moreover, appeared to be countenanced by the deportment 

 of the compound under the influence of iodide of ethyl. To secure 

 at once the last term of ethylation, the base was repeatedly sub- 

 mitted in alcoholic solution to the alternate action of iodide of ethyl 

 and oxide of silver. The product of the reaction was by appro- 

 priate treatment converted into a platinum-salt, which was found to 

 be but slightly crystalline, insoluble in water, but readily soluble in 

 alcohol. Both combustion and platinum-determination proved this 

 salt to contain 



C 18 H,, N Pt C1 8 = [C 12 H 10 (C 2 H s ) 2 N] Cl, Pt CI 2 . 



This salt was decomposed by sulphuretted hydrogen, and successively 

 treated with oxide of silver and iodide of ethyl, chloride of silver and 

 dichloride of platinum, so as to produce in succession the chloride 

 and oxide and, lastly, the iodide, chloride, and platinum-salt of a 

 higher ethylated body. But the platinum-salt thus obtained was 

 found to have still the same composition, which was, moreover, con- 

 firmed by the analysis of a fine bromide, crystallizing in prisms, 

 difficultly soluble in water and ether, but easily soluble in alcohol, 

 and a well-defined iodide, crystallizing in plates and having properties 

 similar to those of the bromide. These salts contained respectively, 



Bromide C 16 H 20 NBr= [C 12 H 10 (C 2 H 5 ) 2 N] Br, and 

 Iodide C 16 H 20 NI = [C 12 H 10 (C 2 H 5 ) 2 N]I. 



But before admitting these substances to be truly diethyl-dipheny- 



2 r2 



