366 



On some New Derivatives of Acetone, 



[May 14, 



Theory. 







Per cent. 







5(5-14 





. ... 13 



7-60 



N 



. ... 14 



8-19 





. . . . 48 



28-07 





171 



100-00 



I. ir. nr. iv. 



56-28 56-79 

 7-97 8-21 



8-32 8-23 



I liave also prepared and analyzed tlie silver-salt of this acid. The results 

 I obtained confirmed the above formula. 



Experiment. 



Theory. 



Per cent. I. II. 



Metallic silver 

 (C,H,,AgN03) 



I 38-84 38-98 38-70* 



The salt was obtained in beautiful mother-of-pearl plates by boiling a 

 solution of the acid with an excess of freshly prepared oxide of silver. It 

 is very soluble in water, and is not much affected by light. It does not 

 suffer decomposition when dried at 100° C. 



The new compound has an acid reaction, and displaces carbonic acid from 

 the soluble carbonates. It is insoluble in cold, pretty soluble in hot water 

 and in cold alcohol, and sparingly soluble in ether. It m.elts at 171° C. 

 The nitrogen appears to be retained with unusual force within the molecule 

 of the new acid. It refuses to give it up in the form of ammonia when sub- 

 jected to the action of an alcoholic sohition of potash, a fact we have already 

 learned from the manner of its formation. Neither can it be made to yield 

 it up by exposing it to the action of nitrous gas. I have tried this gas 

 upon a solution of the acid both in water and nitric acid. - It dissolves 

 in large quantity in strong hydrochloric acid, and, on standing, crystaUizes 

 out unaltered, not combining chemically with that body. 



The salts of this acid are, as a general rule, very soluble in water. 

 The neutralized acid yields no precipitate with nitrate of silver, corrosive 

 sublimate, or chloride of barium. It renders a solution of acetate of lead 

 but slightly turbid, and communicates a red colour to perchloride of iron 

 without precipitating it. 



The soda-salt is very soluble and does not crystallize well. It is pre- 

 pared by neutralizing the acid with carbonate of soda. One molecule of 

 the acid, assuming it to have the composition Cgll^gNO,, I found required 

 exactly one molecule of pure and recently ignited carbonate of soda for 

 complete neutralization. This experiment, and the composition of the 

 silver-salt, render it highly probable that the acid is monobasic.^ 



The mercury-salt crystallizes in beautiful pearly plates. It is prepared 

 by boiling a solution of the acid with freshly precipitated oxide of mercury. 

 It is a very soluble salt. 



* The salt which served for this analysis was made from a freshly prepared batch of 

 the acid. 



