JOURNAL OF THE COLLEGE OF SCIENCE, IMPERIAL UNIVERSITY, 

 TOKYO, JAPAN. 



VOL. XXV., ARTICLE 14. 



The Oximes and Imides 

 of Benzenedisulphonic Acids. 



By 

 Tsuneo Suzuki, Rigakushi. 



I. m-Benzenedisulphoxime. 



By the action of nitrous acid upon m-benzenedisulpliinic acid 

 AuTENRiETH Hud Henxings (Bei'., 35, 1399 ; 1902) obtained the 

 corresponding oxinie, to which they gave a cyclic constitution. 

 In order to see whether this view of its constitution could be 

 confirmed and, at the same time, to obtain further knowledge 

 of the oxime, the following experiments were performed. 



The disulphinic acid was prepared, according to C. Pauly's 

 method (Ber., g, 1595 ; 1876), by reducing m-benzeuedisulpho- 

 chloride with an excess of zinc dust in the presence of w^ater at a 

 slightly elevated temperature. After the reaction had taken place, 

 a solution of sodium carbonate was added to the resulting mixture 

 of zinc m-benzenedisulphinate, zinc oxychloride, unchanged zinc, 

 and water, so as to change the zinc salts into the more soluble 

 sodium salts. The filtered solution was concentrated on a water- 

 bath, mixed with strong hydrochloric acid, and after removing 

 the precipitated sodium chloride, if any, the strongly acid liquor 

 was shaken with ether. The free acid then separated as a viscous 

 liquid between the aqueous and the elherial layers. 



