18 AKT. 13. — T. HAG A : 



Twenty grammes of acetylacetonedioxime were dissolved in two 

 hundred and fifty cubic centimetres of hot water and treated with 

 an excess of sulphur dioxide. After leaving the mixture to stand 

 over night in a well-stoppered bottle the excess of sulphur dioxide 

 was neutralised with sodium hydroxide. On now distilling the 

 mixture by means of a current of steam, an oily liquid passed 

 over. On saturating the aqueous distillate with potassium carbon- 

 ate, more of this oily substance was separated. The total quan- 

 tity of it weighed 11.3 grammes. It boiled constantly at 1432°C., 

 and had the peculiar smell and all other properties of 3:5-di- 

 methylisoxazol. On analysis, the substance yielded the following 

 result : — 



Found Calculated for CJI,ON 



Carbon 61.66 61.86 



Hydrogen 7.49 7.22 



Nitrogen 13.77 14.45 



The reaction must have, therefore, occurred according to the 

 equation : — 



CH,— C— CH„— C— CH3 CH3 .0— CH 



NOH NOH '"'''-'^ ll_o>.CH3 + H.NS03H. 



The quantity of the dimethylisoxazol actually obtained agrees 

 nearly with that calculated according to the above equation, being 

 94.4 per cent of the theory. 



After distilling off the isoxazol, the solution was treated 

 with an excess of dilute nitric acid and the sulphurous acid thus 

 liberated was completely removed by passing a current of air 

 through the liquid. On adding a solution of mercuric nitrate to 

 it, an abundant precipitate of mercuric amidosulphonate was 



