20 ART. 13. — T. HAGA : 



when heated. After boiling with hydrochloric acid, however, the 

 solution reduced it strongly even in the cold. Acetonylacetone- 

 dioxime reduces Fehling's solution freely in the cold, without 

 previous heating with hydrochloric acid. These facts show that, 

 in the oily product one of the nitrogen atoms still remained in 

 union with carbon in a form capable of yielding hydroxylamine on 

 hydrolysis. The non-removal of one of the nitrogen atoms by the 

 action of sulphur dioxide is therefore, not due to its tendency of 

 forming a heterocyclic ring like isoxazol. 



These experiments are very imperfect, but they sufficiently 

 show the remarkable difference in the behaviour of two oximido- 

 groups towards sulphur dioxide. The author intends to make a 

 fuller investigation of this reaction on some future occasion. 



Dibenzenesulphohydroxylamine (Cütl5S02)2NOH. 



This substance was prepared by acidifying the mixture of two 

 molecules of sodium benzenesulphinate and one molecule of sodium 

 nitrite with dilute sulphuric acid, and purifying the crystals that 

 separated out by repeated crystallisations from alcohol (W. Königs : 

 Ber., 1878, ii, G15). AVhen crystallised from alcohol it forms 

 thick tabular crystals, containing one molecule of alcohol of 

 crystallisation. 100 c.c. of 78.2 per cent alcohol dissolved only 

 about 7.1 grammes of these crystals at 18°C. The compound 

 loses all its alcohol when powdered and left over sulphuric acid 

 in a vacuum desiccator. 



Calc. tor 

 Found {C„H,Sü,),NOH,C,H«Ü (CbH^SOJ.NOM 



Lo?s in weight 12.7 12.81 — 



Nitrogen. 3.89 3.90 4.47 



