324 I '■ ■ omposiii Ti ichlortru thyUtibphonbromicU . 



■ ■ doi f the results expected. Derivatives of urea, in 



which one atom of hydrogen is substituted by an organic sul- 

 pho-acid radical, are not known as yet; I tried, consequently, 

 to can-.' Trichlormethylsulphonbroutiide to act <>n ureaat about 

 L20 < . : a double reaction took place: on the one hand the 

 bromide was split up into sulphurous acid and Carbontrichlor- 

 bromide, and on the other hand the rest of the bromide was 

 converted into Trichlormethylsulphurous acid. 



I made several attempts to obtain the predicted, but yet un- 

 known combination (CCl a ) I^OJ, Dichlormeth'ylensulphon. 



I first treated an alcoholic solution of Tricblormethylsulphon- 

 chloride with metallic zinc. The mixture became boiling hot 

 by itsd!; and Trichlorniethylsulphite of zinc was formed: — 



i i [SOJ CI 4-Zn s = (CC1 3 ) [SO] OZn + ZnCl. 



This Trichlprmethylsulphite of zinc was dissolved in alcohol 

 and the solution heated in a sealed tube to 150° C, but no change 

 took place: the expected Dichlormethylensulphon was not 

 formed. .1 then subjected the sodium and lead salt of Trichlor- 

 methylsulphurous acid to dry distillation, when I obtained a 

 small amountof a crystalline body of a penetrating smell, which 

 is the expected combination. On heating it sublimes, but the 



iter part of it is always decomposed into sulphurous acid 

 ami Perchlorethylene, which are tin chief products of the dry 



distillation of aTrichlormetbylsulphite; we obtain the following 

 equations : — 



001.) |So] ON:, vri ■ (CC1,) [SO,] 



' ., , • 



'J rloblorinctbj liulpbtu "f Sodium, Dlculormethylenaulphon, 



and 



2(CC1.) [SOJ - C, 01, SO 



f~ 



L>lclilormeUi)'lcii ulphon. Poreblorethylene. 



