284 P. T. Austen— Nilro- derivatives of Diphenyla* 



acetic acid. It is difficultly soluble i 

 easily in hot. 



P7*operties.— The compound forms a light-yellow and extra* 



ler. It fuses at 1S1°. 



Owing to the small amount of the substance at my disposal, I 



have not been able to investigate its properties more thoroughly. 



Since the pierylnitranilines contain the mononitrophenyl- 

 group, it appeared extremely probable to me that a further 

 nitrition could be effected. In this cum', since the trinitro- 

 phenyl-group seems to be the limit of direct nitrition of the 

 phenyl-group, I could predict* that by the nitrition of the 

 picryln tranilitio. higher nitro-members would be formed, and 

 that the nitro groups would enter into the mononitrophenyl- 

 group. If, then, by the nitrition of the picrylni 

 higher isomeric nitrocompounds were obtained, the isomerism 

 must reside in the uitrized mononitroplmnyl-gr.mp, since the 

 henyl-group remains unchanged during th< 



It is, however, very possible that in one of the resulting com- 

 pounds the two picryl-groups may be identical. 



Since the positions < f tin nitro-uToups in t\iv>, d 

 has not been ascertain. I. I sh T l v pn s. at t ,. trii ti •; ! • ' x ^ 

 group of picric acid by a, and the dinitromonon 

 groups of meta and paranitraniline by ft and y respectively- 

 Only two of these picryl-groups can be identical. 



* Supposing that the imido-group would withstand the action of the nitrous 



\ That is, we suppose it does. The supposition will doubtless remain synony- 

 mous with the fact for some time to come a hanged by the 

 action of nitrizing agents. Hence we suppose that | 

 when combined in the picrylnitraniliue also remains unaltered dur: 

 I have no proof, however, that the introduction of two nitro-groups into the inono- 

 mtrophenyl-group does not exert a displacing action on the members of the 



Qg the paradibrombenzol, I find that the relative amount 

 formed are not constant. This seems to depend on the strength and the amounts 

 of the acids used as well as on the duration and temperature of the heating. 1 

 able to produce m rill. "^ * X& ° ^ ' 



interesting field is opening in regard to whether several isomers i 



