;<> Upon a Fourth Monobromphenol. 



complication, but a simplification of the chemical notions will 

 be manifest. 



Isomeric Moxojbromphexols. 



Hiibnerand Brenken* have been the first to prepare a crystal- 

 line monobromphenol from phenol, in a glacial acetic acid solu- 

 tion with bromine, as well as also from J? — brom-salicylic acid. 

 They gave its melting-point from 63° to 64° ; its boiling-point. 

 235°' to 236°. 



Fittig and Magerf gave to this product the boiling-point of 

 238°, by identifying it with a body which they obtained, from 

 p — bromnitro-benzol. Hereby was, at the same time, in the sense 

 of the benzol-hypothesis, this bromphenol characterized as a 

 paraderivative, especially as, by melting it with potassic hydrate, 

 it passed over into resorein (formerly considered to be p— dioxy- 

 benzol.) Korner+ prepared this (para) bromphenol from com- 

 mon nitroacetanilid, and gave its melting-point 66.4°, while 

 Fittig and Mager§ retained the one previously found (64°). 

 These|| described, also, the isomeres, o — brom and m — bromphe- 

 nol, the former as a body of the boiling-point, 194° to 195. c 

 which, when cooling, does not solidify ; the latter having a 

 melting-point of 32 to 33°, and a boiling-point of 236° to 236.5°. 



Korner*" obtained, further, from p — bromphenol a monobrom- 

 dinitro-phenol of the melting-point 75.6°; from o — bromphenol, 

 a monobrom-dinitro-phenol of the melting-point, 118.2° (previous. 

 ly prepared by Laurent) ; from m-bromphenol, besides other pro- 

 ducts, a monobrom-dinitro-phenol melting at 91.5°. A monobrom- 

 inononitro-phenol of the melting-point, 88°,** was iikewise pre- 

 pared from p — brom-phenol by Korner. ff 



* Jahresb. d. Chem., 1883, 409, etc. 



f The same, 1874, 461. 



\ Tlie same, 1875, 336. 



§ The same, 1875, 417. 



I The same, 1875, 416, 417. 



f The same, 1875, 335, 336. 



** Brunck, Jahresb. d. Chem. , 1867, CIS. 



\\ Jahresb. d. Chem., 1875, 336. 



