186 Proceedings of the Royal Irish Academy. 



in colour through yellow to light-brown. After a month the solid was filtered, 

 washed, boiled with alcohol, and again filtered from a small amount of brown 

 ue. From the alcoholic solution on cooling the same dinitrotoluidine as 

 that previously obtained separated. 



The aqueous ammoniacal solution on acidification evolved nitrous fumes, 

 and gave a slight brown precipitate, 



IX. J .1 - -Trinitn I 



1. Trinitrotolueni eated with aqueous ammonia in a manner similar 



t" that ■ I for thi - [pound. The solid which remained after 



shaking for a month had a brown colour, and when crystallised from alcohol 



I of yellow crystals which melted .it 190-192° C.,and it was therefore 



the y-dinitrotoluidine of Hepp <'». 



The aqueous ammouical solution on acidification gave a slight brown 

 precipitate with evolution of nitrous 



X. ./ • - / »i- T I ' ■ -n- . 



[molecular pi - of a-trinitrotoluene and //-toluidine (5 grams 



of the former and 2'4 _ A the latter) « - lved in benzene and the 



irere mixed. • lution was obtained which, on 



I needles, which were separated and 



dried. 1 melted it 68-7 I 



tiou of trinitrotol molecular proportions 



nice, mixed with excess of p-toluidine, was 

 obtaii 



Thi- in colour, and finally 



Ive it with decomposi- 

 tion int it. it first turns lighter in 

 •ur. giving ting it g dually dissolves com- 

 pletely, the i If this solution l>e cooled 

 rapidly cular crystaU - 31° C, are deposited. The 

 iier liquid from t s, on concentration, first a crop of red 



then .di. plates e ftening at 



ind melting at 12—14 I evident that the substance is 



mponentc lution. 



Dil the body int" trinitrotoluene and p-tolui- 



dim 



I Clarke previously obtained this compound by i Bomewhat 

 ditlerent 



