[tingle-lawrance] 



POLYNITRO COMPOUNDS 



11 



allow further investigation on this substance, which was neither pure 

 nor stable enough to permit the obtaining of a definite melting point. 



Summary: 



1. The product of nitration of Picranilid with Nitric and Oxalic 

 Acids is 2,4,6,4' — tetranitrodiphenylamine. 



2. When Trichloracetic Acid is substituted for Oxalic Acid a 

 Bis. — 2,4 — and a symmetrical tetranitrodiphenylamine are obtained. 



3. By nitrating Diphenylamine with Nitric Acid, under con- 

 ditions described above, the main product is symmetrical tetra- 

 nitrodiphenylamine, together' with a small quantity of a tetranitro- 

 diphenylamine not described in the literature, and a compound 

 unidentified. 



Chemical Laboratory, 



McMaster University, 



Toronto, May 1st, 1918. 



