24 ART. 1P>. — T. HAG A : 



3Iercury dibenzenesulphimide, {(CGH5S02)2N}2Hg, is obtained 

 by mixing a solution of the imide or any of its soluble salts 

 with one of mercuric nitrate. It forms almost insoluble microscopic 

 scales, which dry up to a chalk-like mass, difficult to wet, and 

 which, when once dried, can hardly be completely decomposed 

 by hydrogen sulphide solution. Its solubility is so small that 

 washings of it are scarcely coloured by hydrogen sulphide. 



3Iercttrons dibenzenesulphimide, (C6ll5S02)2NIIg, is obtained 

 when mercurous nitrate solution is added to a solution of the 

 imide or its salt. It forms fine microscopic needles nearly as 

 insoluble as the mercuric compound. 



Silver dibenzenesulphimide is obtained as fine silky needles 

 by adding silver nitrate to a solution of sodium dibenzenesulph- 

 imide. It is sparingly soluble in water one part of it dissolving 

 in about 170 parts of water at 23°C. 



Potassium dibenzenesulphi7nide (C6H5S02)2NK, crystallises in 

 thin pearly scales, also sparingly soluble in water. One hundred 

 parts of water at 28°C. dissolves only about 0.76 parts of this 

 salt. Its solution does not give any precipitate with silver 

 nitrate. 



Found Calculated. 



Potassium 11.71 11.67 



Sulphur 19.09 19.12 



Nitrogen 4.20 4.18 



