Z ART. 14. — T. SUZUKI : THE OXIMES AND 



The following procedure was also adopted and found to answer 

 the purpose equally well. To the resulting mixture of zinc 

 salts and unchanged zinc a slight excess of potassium carbonate 

 was added, and the solution of the potassium salts so obtained 

 was slowly evaporated in vacuo over sulphuric acid. Prismatic 

 crystals of potassium m-benzenedisulphinate separated along with 

 the crystals of potassium chloride. The latter often formed 

 clusters of octahedra and could be easily mechanically separated 

 from the prismatic crystals of the m-benzeuedisulphinate. The 

 yield is very small, as is also the case with the method above 

 described, owing to the great solubility in water of both the free 

 acid and the potassium salt. 



To a mixed solution of an alkaline nitrite and m-benzene- 

 disulphinate, dilute sulphuric or hydrochloric acid was added 

 drop by drop with constant stirring, care being taken not to let 

 the mixture become warm. A white voluminous precipitate of m- 

 beuzenedisulphoxime, consisting of fine short needles, was thrown 

 down. This was Avashed with water and recrystallised from 

 acetone or alcohol. 



This substance is tolerably soluble in acetone or alcohol, 

 slightly so in ether or acetic ether, insoluble in benzene, chloro- 

 form, carbon bisulphide and w^ater ; but the last solvent takes 

 up a small quantity of it at higher temj^eratures and separates it 

 as long needles on cooling. Crystallised from acetone the oxime 

 forms hard colourless prisms, whilst from alcohol it crystallises in 

 plates ; both crystals contain the solvents which are partly given 

 off on exposure to the air and completely driven away on heating 

 at 100°. AVhen boiled with alcohol for many hours the oxime 

 is changed into a non-crystalline viscous substance. An aqueous 

 solution of caustic soda or potash dissolves the oxime, which can 



