619 



ever, have been furnished by Messrs. Church and Perkin* in the 

 colouring matters produced by the action of nascent hydrogen on 

 dinitro-substitutes, or of nitrous acid upon certain monamines. 



Phenylamine C 12 H 7 N, 



(TT \ 

 NO )^" 



Naphthylamine C 20 H 9 N, 



Nitrosonaphtylin C 20 ( >JQ )N. 



Expressed by these formulae, the substances in question appear to 

 be closely allied to Mr. Wood's base ; in fact, nitrosonaphtylin has 

 the same composition as ninaphthylamine. But a superficial com- 

 parison of the properties of the two bodies excludes any idea of their 

 being identical. The formulae of nitrosophenyline and nitrosonaph- 

 tylin have not as yet been finally established by the analysis of their 

 compounds, these substances, like colouring matters in general, 

 being of an indifferent character. It is probable that they are formed 

 by the association of several molecules, a supposition which receives 

 considerable support from the discovery of ninaphthylamine. 



The formation of ninaphthylamine promises to add considerably 

 to the number of nitro-derivatives of the aromatic monamines. To 

 each of these substances probably corresponds a nitrous and a nitric 

 substitution-base, but as yet we are unacquainted with a single one 

 in which both derivatives are known, as shown by a glance at the 

 groups best examined. 



Phenyl. Group. Naphtyl. Group. 



C 12 H 5 ] C 20 H 7 



Phenylamine. ... H y N, Naphthylamine H > N. 

 H J H J 



C 12 (H 4 N0 2 ) 1 N Ninaphthyl .O M (H 6 N0 2 ) ] 



Unknown.. H L W> r H [ N. 



H J amme.... R J 



C, (H 6 NO 4 ) J 

 H J 



* Journal of Chemical Society, vol. ix. 1. 



