Nitrogenous Derivatives of the Phenyle- and Benzoyle-series. 37 1 



tion of diazodinitrophenol may perhaps be best understood by re- 

 presenting it by the formula 



/ H„ 

 C, 



(^(NOJ,)o, 



The transformation of this compound into 



/="((N0*j0' 

 involves the decomposition of 2 equivs. of water, the oxygen of 

 which appears to be consumed in the formation of secondary pro- 

 ducts of decomposition. No trace of oxygen, either free or com- 

 bined, could be found among the gaseous products ; the gas evolved 

 consisting, according to a minute examination, of perfectly pure 

 nitrogen. 



Diazonitrochlorphenol, 

 Treatment in a similar manner of amidonitrochlorphenol 



C,,H,ClNO,=cJ^^O 0„ 



irN/ 



a new mixed derivative of phenol, as might have been expected, has 

 furnished perfectly similar results. The new compound thus ob- 

 tained crystallizes in beautiful brown-red needles, of physical and 

 chemical properties similar to those of the preceding compound. 

 It contains 



C,,H,C1N3 0,=C 



Diazonitrophenol, 



This substance is formed by submitting the ethereal solution of 

 diphenamic acid, 



C„H,NA.=C,Y(NOJ,)o„ 

 V(H,N)/ 

 discovered by Gerhardt and Laurent, to the action of nitrous acid. 

 It is a yellow, crystalline, very unstable compound, containing 



C,,H„N„0,=aY(NOl^O,; 



it explodes with extreme violence at the temperature of boiling 

 water. The alkalies decompose it instantaneously with evolution of 

 nitrogen and formation of products which are not yet aaialysed. 



Action of Nitrous Acid upon Benzamic Acid. 



The product obtained in a similar manner from benzamic acid is 

 an. orange-yellow crystalline precipitate, which constitutes a dibasic 



