JACKSON AND GALLIVAN. — TRIBROMANILINE. 53 



the constant melting point 130°, the substance was dried at 100°, and 

 analyzed with the following result : — 



0.2341 gram of the substance gave 0.3513 gram of argentic bromide 

 by the method of Carius. 



Calculated for CsHBraNOjNHa. Found. 



Bromine 64.00 63.87 



Properties. — This tribromnitraniline crystallizes in rather thick yel- 

 low needles often united longitudinally, and sometimes very much 

 branched. It melts at 130°; and is very soluble in ether, benzol, chloro- 

 form, acetone, ligroin, or carbonic disulphide ; soluble in alcohol ; soluble 

 with difficulty in hot water. 



Behavior of Tribromdinitrobenzol (Brg 1, 2, 4 (N02)2 3, 5) 



WITH SODIC EtHYLATE. 



This reaction was described in our previous paper,* but, unfortunately, 

 in determining the composition of the principal product we relied only 

 on a bromine determination. On returning to the subject we realized 

 that this was entirely insufficient to settle the nature of the body, since 

 the ethoxy group has nearly the same molecular weight, 45, as the nitro 

 group, 46, and therefore our bromine determination would serve equally 

 well for a tribromresorcine (the composition which we had assigned 

 to it, percentage of bromine 59.55), or for a tribromnitropheuetol (per- 

 centage of bromine 59.40). We accordingly prepared some more of 

 the substance and tested for nitrogen, when to our great mortification we 

 found that it was present, and that the substance therefore is tribrom- 

 nitropheuetol, and not tribromresorcine. We regret exceedingly that 

 our carelessness should have introduced this mistake into the chemical 

 literature. Its composition was definitely settled by the following 

 analyses : — 



I. 0.2430 gram of the substance gave 0.3407 gram of argentic bromide 



by the method of Carius. 

 II. 0.3797 gram of the substance gave 11.9 c.c. of nitrogen at a tem- 

 perature of 26° and a pressure of 766.5 mm. 



Calculated for Found. 



CeHBrgNOoOCaH, I. II. 



Bromine 59.40 59.67 



Nitrogen 3.47 3.51 



* Amer. Chem. Journ., XVIII. 244. 



