28 ART. 13.— T. HAG A : 



Fourni Cale, fur C^ JI,,Ü,Ny,BaJ,H,0 



Barium 16.85 16.62 



Sulphur 15.00 14.95 



Water (loss of weight at 165°C.) 7.85 8.46 



The salt conti uues to lose water very slowly even at 150° C. 

 It is, therefore, necessary to heat it for a long time at 160-170°C., 

 before the weight becomes constant. 



The production of diorthotoluenesulphimide from the corres- 

 ponding hydroxylamine was accompanied by the formation of free 

 sulphuric acid, as was to be expected. But, just as in the case of 

 dibenzenesulphimide, the quantity of this acid, which was formed, 

 was found to be only about two-thirds of the quantity calculated 

 on the supposition that one molecule of sulphuric acid is formed 

 along with one molecule of the imide. This is, no doubt, likewise 

 due to the formation of ethylsulphuric acid. The possible forma- 

 tion of toluenesulplionic acid by the hydrolysis of the diortho- 

 toluenesulphohydroxylamine in presence of aqueous alcohol was 

 prevented, as far as possible, by liaving an excess of sulphur 

 dioxide. 



Diparatoluenesulphimide, (C7H7ÖÜ2)2NH. 



Paratoluenesul[)liinic acid was fii'st [)repared by Gattermann'.s 

 method (loc. cit.). Ten grammes of paratoluidine gave eleven 

 grammes of the sulphinic acid, equal to seventy six per cent of 

 the theoretical yield. This was converted into the sodium salt, 

 dissolved in water and mixed with the calculated quantity of sodium 

 nitrite. On acidifying the mixture with dilute sulphuric acid, 

 diparatoluenesulphohydroxylamine separated out in the crystalline 

 state. Seven grammes of tlie sulphinic acid yielded seven gram- 



