14 Upon a Fourth Monobromphenol. 



Armstrong and Brevost* received as main product a monobrom- 

 dinitro-phenol that melted at 78°, and which accordingly may 

 fairly be considered identical* with the above prepared by Kor- 

 ner. The latter^ prepared besides, from m — broruphenol, an 

 isomeric monobrom-dinitro-phenol of the melting-point 91.5°, 

 which he likewise obtained§ from a dinitro-dibrom-benzol by 

 the action of potash-lye: o — bromphenol gives, according to 

 Korner, || as the only product of reaction with nitric acid, the 

 brom-dinitro-pheriol obtained before by Laurent from a dini- 

 trophenol with bromine, and to which Korner gives the melting 

 point 118.2°. Surely the very same body has also been prepared 

 by other investigators, and described || with the melting-point 

 117°, f 115°,** and 116°tt respectively. 



Xone of the above nitro-derivatives will form if the nitration of 

 the new T bromphenol is made according to the method employed 

 by Korner (in a solution of glacial acetic acid). 



If one part of bromphenol is dissolved in about three parts of 

 glacial acetic acid, and this solution is dropped into nitric 

 acid of 1.4 specific gravity, which is kept constantly cool, an 

 oily mass is first obtained. This, on being put in a cool place, 

 solidifies gradually. This combination is a molecular combina- 

 tion. It is true that it can be once recrystallized from alcohol 

 for rectification, but by a continued treatment with it, especially 

 boiling for some time, it decomposes into different nitro-pro- 

 ducts, according to conditions which I did not follow up more 

 closely. After one careful crystallization from warm (not boil- 

 ing) alcohol, it melts at 60° to 6o c . For combustion, such a 

 product gave the following numbers : — 



0.3516 gr. furnished 29.34 percent. C, and 1.90 per cent. H. 

 A body of "the formula C 6 H 8 Br (NO,) OH. C 6 H 2 Br (NO a ) 2 H. 



* The same, 1874, 461, etc. 



f According to another communication (Jahresb. d. Chem., 1875, 339)] 

 however, the melting point of these bodies is equal to 85. 6 : . 

 % Jahresb. d. Chem., 1875, 335. 

 § The same, 1875, 340. 

 |f The same, 1875, 335. 

 •" The same, 1874, 461 and 467. 

 ** The same, 1873, 411. 

 ft The same, 1875, 427. 



