PERI IXYLA.MINESULPHONA.TES AND HYDROXYLAMINETRISULPHON LTES. :{ 



it behaves as a derivative of hydroxylamine. But, because it does do1 

 decompose when in strongly alkaline solution, he will not allow thai 

 it Is thai base trisulphonated. He modifies Claus's two formulas, 



writing that for the coloured salt as (S0 3 K) 2 N^- -^N(S0 3 K) 2 , and 



thai for the white salt as (S0 3 K) 3 N<q>N(S0 3 K) 3 , 2H 2 0. 



Hantzsch and Semple have found (Ber., 1895, 28, 2744), that, 

 when crystals of 2/3-normal potassium hydroximinosulphate form in 

 a bluish-violet solution of potassium sulphazilate, they may contain 

 1-4 percent, of this salt, apparently in solid solution, and consequently 

 show bluish- violet colour. These chemists have therefore advanced the 

 view that Fremy's coloured salt, which they have re-named 'nitroxy- 

 disulphonate,' is sulphonated nitric peroxide, the orange-yellow crys- 

 tals of which have double the molecular magnitude of its dissolved 

 bluish- violet form, in analogy with the two forms of nitric peroxide 

 itself. The formula for the bluish-violet modification is given in a 

 foot-note as ON:(S0 3 K) 2 , in which, therefore, the nitrogen is re- 

 presented as being trivalent and the oxygen as univalent. A struc- 

 tural formula for the yellow modification is not given, but liaschig's 

 is rejected, as having two quinquevalent nitrogen atoms in union with 

 each other, a mode of combination which is without parallel. Kaschig's 

 formula for the white salt is also rejected, but as the simpler one propos- 

 ed by Claus is adopted in its place, the quinquevalency of the 

 nitrogen is maintained. On the authority of Schatzman, and as a result 

 of their own experiments in the case of hydriodic acid, these chemists 

 state that, in acting as an oxidising a^ent, the coloured salt reverts to 



hydroximinosulphate. 



In 1896, Sabatier (Compt. rend., 122, 14L7, 147!), and 1537; 123, 

 255) published the results of an investigation of the violet solutions 

 produced by re hieing agents acting on a sulphuric acid solution of 

 nitrososulphuric acid, and suggested that the colour is due to the 



