JOURNAL OP THE COLLEGE OP SCIENCE, IMPERIAL UNIVERSITY, 

 TOKYO, JAPAN. 



VOL. XIX., ARTICLE 17. 



Constitution of Nitric Peroxide. 

 By 



Edward Divers, M. D., D. Se, F. B. S., 

 Emeritus Professor of Chemistry, Imperial University of Tolcyo. 



In a paper appearing with this (this vol., Art. 15), Haga has 

 demonstrated that Fremy's sulphazilate is an oxi me- peroxide and a 

 tervalent nitrogen compound. If Hantzsch and Sem pie's suggestion 

 is accepted (Bcr., 1895, 28, 2744 ; cf. Piloty and Schwerin, Ber., 

 1901, 34, 1884 and 2354), that Fremy's salt is also a sulphonated 

 nitric peroxide, it follows that the constitution of nitric peroxide is at 

 last determined, being that of nitrosyl peroxide. Hantzsch and Semple 

 must be right, for, after Haga's researches, a sulphazilate as a peroxyl- 

 aminesulphonate cannot be supposed to be other than a sulphonated 

 nitric peroxide. It only remains, therefore, to show that nitric 

 peroxide is a true peroxide in its chemical relations. 



It is formed from nitric oxide and oxygen, just as sodium 

 peroxide is formed from sodium and oxygen. Nitrous acid cannot, 

 indeed, be shown to pass simply into it and back again, as a 

 hydroxylaminedisulphonate (sulphonated nitrous acid) changes into 

 a peroxylaminesulphonate, but that is only on account of its own 

 instability and that of nitrous acid. 



