P. T. Austen — Dinitroparadibrombenzoh. 97 



Betadinitroparabromaniline. 



By heating the betadinitroparadibrombenzol with alcoholic 

 ammonia for eight hours in a closed tube at 100°, I obtained a 

 deep red solution, from which a large mass of red scales sepa- 

 rated on cooling. The solution was poured into cold water, 

 and the resulting yellow precipitate dissolved in boiling abso- 

 lute alcohol which contained animal charcoal, filtered, and 

 allowed to stand. The pure substance obtained in this manner 

 formed orange-ivd scales fusing at 160°.* 



0-3010 grms. of substance gave 0-0506 grms. of H 2 and 

 0-3044 grms. of CO 2 . 



0-24 grms., after the method of Carius, gave 0-148 grms. of 

 AgBr and 0-0027 grms. of Ag. 



Calculated for C 6 H 2 (NO') 2 NH 2 Br. Found. 



C=27-48 27-58 



H= 1-52 1-86 



Br=30-53 30-90 



The substance is easily soluble in boiling alcohol and glacial 

 acetic acid. It is almost insoluble in water, and entirely so in 

 carbon disulphide. 



It is not acted upon by boiling amyl nitrite, although in a 

 closed tube at 100° the substances react. No defined product 

 was obtained, which, however, was more probably owing to the 

 small amount of substance used than to the absence of a dini- 

 trobrombenzol. 



Strong alcoholic ammonia remained at 200° without action 

 upon it. This, however, was not surprising, since, according 

 to Meyer and Wurster,t only one bromine atom of the mono- 

 nitroparadibrombenzol can be substituted by direct action of 

 ammonia. A somewhat similar case is recorded by Armstrong.^ 

 He found that the chlorine atom of dinitrochlorphenol was 

 not affected by ammonia. The weakening action of the nitro- 

 groujis may, perhaps, here be overcome by the formation of the 

 - - 

 When boiled with alcoholic potash the substance evolves 

 ammonia, but the nitro-groups appear to be affected, and a 

 general decomposition is the result. 



Betadinitroparabromanilidobenzol. 

 On treating the betadinitroparadibrombenzol with aniline, 

 the mass assumed a fine red color. On heating a violent reac- 

 tion ensued, and the mixture boiled of itself. The 

 was allowed to cool, and then treated wit! 

 acid. An oil separated and gradually solidified. The dark 

 * It is worthy of notice that the fusing point of this compound (160°) is nearly 

 t BeTdfd. chem. t G^s a ! P v'! a 6^2! trOPa ' """ ^hem. Soc. J., (2), x, 12. 



