148 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Propel ties of Bromdinitroresorcine Dletliylether, melting at 81°-82°, 

 CGH(C.,H50)oBr(NOo)2. 



It forms when crystallized from alcohol white ueedles or slender prisms 

 terminated by two planes at an obtuse angle to each other, which turn 

 brown on exposure to the light. It melts at 8l°-82°, and is very soluble 

 in benzol, or chloroform ; soluble in methyl alcohol, acetone, glacial acetic 

 acid, or carbonic disulphide; slightly soluble in cold ethyl alcohol, more 

 soluble in hot ; slightly soluble in ligroin. Alcohol is the best solvent for 

 it. It is not acted on ap|)arently by strong hydrochloric acid, either hot 

 or cold ; strong sulphuric acid does not act in the cold, but when warm 

 dissolves it with a brownish red color; strong nitric acid does not act in 

 the cold, but gives a colorless solution with it when hot. 



That tliis bromdinitroresorcine diethylether was not the only organic 

 product of the reaction of sodic ethylate on trichlorbromdinitrobenzol was 

 shown by the fact that sodic nitrite as well as sodic chloride was formed. 

 Our attempts to isolate these other bodies, however, were far from suc- 

 cessful. Some experiments with the aqueous wash waters seemed to 

 indicate that they contained a phenol melting at 111°, and having pei- 

 haps the formula Cg(OC2lI)20II(N02)2lir> but the analytical data 

 obtained were too imperfect to justify a description of the body ; and we 

 did not succeed in bringing any of the other products into a state fit for 

 analysis. 



The trichlorbromdinitrobenzol seemed to give colored compounds with 

 sodic ethylate similar to those given by picrylch oride and several other 

 nitro compounds, since upon adding an alcoholic solution of sodic ethylate 

 to the dry substance it took on a strong vermilion color, which was in- 

 stantly destroyed by w'ater, and more slowly by benzol or ligroin. Tiie 

 fact that the color disappeared on the addition of water indicates that it 

 is one of the colored compounds under discussion, and not a salt of a 

 phenol. Another sample of the color was allowed to stand for half an 

 hour exposed to the air, at the end of which time the red color had given 

 place to yellow. As the colored compound was less stable than several 

 others which have been studied, its investigation was not carried further. 



The trichlorbromdinitrobenzol is acted on by an alcoholic solution of 

 sodium malonic ester. Our first experiments gave a crystalline product, 

 but in too small quantity for analysis. Our later experiments have 

 yielded only viscous masses, from which we have not succeeded in ob- 

 taining anything for analysis in spite of a very large expenditure of time 

 and material. 



