the Action of Ammonia on the Terbromide of Allyle. 259 



VI. 0-4] 60 grm of salt, burnt with quicklime, gave 0-7208 

 grm. mixed chloride and bromide of silver. 

 Pei'-centage composition : — 



I. II. III. IV. V. VI, 



Carbon . . 24-40 23-80 

 Hydrogen . 3-64 3-76 



Nitrogen 4-77 4-98 



Chlorme 12-65 



Bromine 52-80 



These numbers agree with the formula given above, as will be 

 seen by the following per-ccntage Table, in which the theoretical 

 and expei-imental numbers are placed in juxtaposition : — 



Theory. Mean of 



291-50 100-00 



The hydrochlorate of dibromallylammonia is of a light bulF 

 colour, extremely soluble in water and alcohol, slightly soluble 

 in £Ether. It has a sweet, pungent, aromatic taste, which is 

 highly characteristic. Long exposure to the temperature of 

 100° C. causes it to become dark in colour, probably from slight 

 decomposition ; nevertheless it is by no means an unstable body, 

 as it requires a very high temperature to effect the destruction 

 of the molecule. At the temperature of 160° C. it partially 

 sublimes. On the addition of nitrate of silver to a solution of 

 this salt in water, double decomposition ensues, and all the 

 chlorine is precipitated in the form of chloride of silver : the 

 bromine, however, is not precipitated, but remains in solution. 

 This proves clearly that these two bodies occupy totally diflPcrent 

 positions in the molecule. 



Bichloride of Platinum and Hydrochlorate of Dibromallylammonia. 



I have been enabled to confirm the above formula, and to 

 ascertain the atomic weight of the new body, by the analysis of 

 the double salt which it forms with bichloride of platinum. This 

 salt is readily prepared of great beauty and in a state of perfect 



* The deficiency of bromine arose from the salt not hiiving been per- 

 fectly <lry, I found it very difficult to effect its complete desiccation in 

 the air«pump. 



S2 



