THE IMIDES OF THE AROMATIC SÜLPHONIC ACIDS. 27 



powdered and dried in a sulphuric acid desiccator, melted com- 

 pletely at 184°C. with previous sintering at about 178°C. The 

 compound is only very sparingly soluble in water, and is pract- 

 ically completely thrown out of the solution by the addition of 

 hydrochloric or sulphuric acid. Analysis of the air-dried crystals 

 gave the following results : — 



Found Calculated for 



C,,H.,0,NS,,H,0 2C,,Hj,0,NS„3H,0 



Sulphui- 18.47 18.68 18.20 



Nitrogen 4.27 4.08 3.98 



Water (loss of weight at 120") G.öO 5.25 7.67 



Determination of the Molecular Wevjht : — The following num- 

 bers were obtained for the molecular weight of diorthotoluene- 

 sulphimide by the ebuUioscopic method, using acetone as the 

 solvent. 



The weight of the anhydrous substance taken, 1.4988 gram- 

 mes; volume of the solution, 24c.c.; elevation of the boiling point, 

 0.39°C.; hence the molecular weight, 366. 



Volume of the solution, 25.5 c.c; elevation of the boiling 

 point, 0.37°C.; hence the molecular weight, 356. 



Volume of the solution, 29 c.c; elevation of the boiling point, 

 0.35°C.; hence the molecular weight, 338. 



Found Calculate<l 



Molecular weight -353.3 (moan) 325.3 



Barium diorlhotoluenesulphimidc forms minute needle-shaped 

 crystals, easily soluble in water. 



Analysis of the air dried salt gave the following 

 reöults : — 



