106 PROCEEDINGS OF THE AMERICAN ACADEMY 



pared the diamidotrinitrobenzol from the ethylether of trinitroresor- 

 cine and alcoholic ammonia, and then reduced this product with tin 

 and hydrochloric acid, whereas we submitted to a similar reduction the 

 triamidodinitrobenzol made by the action of alcoholic ammonia on tri- 

 bromdinitrobenzol. Both this triamido and the corresponding triani- 

 lido compound are new, and an account of them is therefore included 

 in this paper. 



Triamidodinitrobenzol, C H (NHn^fNO^. 



This substance was prepared by treating tribromdinitrobenzol,* 

 melting point 192°, with alcoholic ammonia ; but this action takes place 

 much less easily than in the case of the corresponding trinitro com- 

 pound, for whereas that was attacked by alcoholic ammonia in the cold, 

 and the reaction was rendered complete by short boiling in a flask 

 with a return condenser, the dinitro compound gave no action with 

 alcoholic ammonia in open vessels, but it was necessary to heat the 

 two substances under pressure in the water bath to bring about the 

 reaction. 



As we had no digester fit for this purpose, we were obliged to heat 

 the mixture in soda-water bottles, which were kept in a boiling water 

 bath for about eight hours. The contents of the bottles at the end of 

 this time consisted principally of a mixture of dark reddish yellow 

 needles with nearly black amorphous masses. There was also a colored 

 alcoholic solution, which on evaporation left a red amorphous sub- 

 stance with a comparatively low melting point ; but this was formed in 

 such small quantities that we did not attempt to study it beyond ascer- 

 taining the fact that it is not altered by further heating with alcoholic 

 ammonia. The tribromtrinitrobenzol, when treated with alcoholic 

 ammonia, forms a similar by-product,f soluble in alcohol, which is now 

 under investigation. The two products of the reaction which were 

 not dissolved in the alcohol were separated mechanically, washed 

 thoroughly with various solvents, and analyzed without further purifi- 

 cation, as they both showed such a slight solubility in all the common 



* The tribromhenzol used in making this substance must be purified by crys- 

 tallization from alcohol after it has been distilled, as, if this crystallization is 

 omitted, a substance melting in the neighborhood of 95° remains mixed with 

 the tribromhenzol, and gives rise to very impure products after the treatment 

 with nitric acid. The nature of this impurity will be considered in another 

 paper. 



t These Proceedings, Vol. XXIII. p. 145. 



