ÖiO 



The arrangement of the experiment was similar to tlie nietiiod 

 used by Walton '') for measuring the reaction between hydrogen 

 peroxyde and iodine-ions. 



From the phenol were also pi-epared, besides the salts mentioned 

 above: the compound with ammonia m.p. 108°; with ethylamine 

 m.p. 179° ; with dimethylamine m.p. 183°. 



2.3.4.6- Tetranitrophenylethylnitramine. 



For the preparation of this compound could not be applied the 

 direct nitration of diethylaniline because the method of separation 

 with sulphuric acid proved a failure here. 



Therefore, 3.4-dinitrodiethylaniline (m.p. 95°) was dissolved, with 

 cooling, in 20 parts of nitric acid (D 1.49). Three parts of sulphuric 

 acid (D 1.84) are then added and after waiting for an hour the 

 whole is heated for a moment to 70°, cooled rapidly and then 12 

 parts of sulphuric acid are poured in. The mass is poured out into 

 ice-water, the separated yellow, viscid mass is dissolved in nitric 

 acid (D 1.49) with addition of sulphuric acid. After some time almost 

 colourless crystals of the tetranitrophenylethylnitramine m.p. 96° 

 are deposited. The yield is not very favourable. (From 2.8 grams 

 was obtained 1.9 grams and on another occasion 2 grams yielded 

 1.5 grams). 



A better result was attained by treating the 3.4-dinitrodiethylaniline 

 (2 grams) first with 30 c.c. of nitric acid (D. 1.33) and 1 gram of 

 sodium nitrite : the product formed was then dissolved in nitric acid 

 (D 1.49) with addition of sulphuric acid. 



The 2. 3. 4. 6-tetranitrophenylethylnitramine dissolves readily in 

 benzene and in toluene ; on heating with bases ethylamine is evolved. 

 Alcohols readily react with it, particularly on heating, with forma- 

 tion of nitrous esters. Amines also react with it. For instance, ethyl- 



2) Z. f. Ph. Gh. 47, 186 (1904). 



