Thialdine and Selenaldine. 475 



0-4577 grm. of hydrochlorate of thialdine gave 0-5933 grm. 

 of carbonic acid and 0*2850 grm. of water, corresponding to 

 35*35 per cent, of carbon and 6-92 per cent, of hydrogen. 



0*726 grm. of hydrochlorate of thialdine gave 0*789 grm. of 

 ammonio-chloride of platinum. 



0-7735 grm. of hydrochlorate of thialdine gave 0*8225 grm. 

 of ammonio-chloride of platinum. In the mean, 6*79 per cent, 

 of nitrogen. 



0*7798 grm. of hydrochlorate of thialdine gave 1-890 grm. 

 of sulphide of silver = 32*09 per cent, of sulphur. 



0*7735 grm. of hydrochlorate of thialdine gave 1-915 grm. 

 of sulphide of silver = 31*92 per cent, of sulphur. 



0*7598 grm. of hydrochlorate of thialdine was precipitated 

 with nitrate of silver and boiled until evolution of gas had 

 ceased ; the precipitate, when extracted with ammonia and 

 precipitated with nitric acid, gave 0*5283 grm. of chloride of 

 silver = 17*14 per cent, of chlorine. 



0-7735 gi*m. treated in the same way, gave 0-5405 grm. of 

 chloride of silver = 17-24 per cent, of chlorine. 



0-776 grm. dissolved in alcohol and precipitated in the same 

 manner with nitrate of silver, gave 1*912 grm. of sulphide of 

 silver = 31*903 per cent, of sulphur and 0*551 grm. of chlo- 

 ride of silver = 17*551 per cent, of chlorine. 



0*441 grm. ignited with a mixture of lime and nitrate of 

 potassa, gave 0*32 grm. of chloride of silver = 17'94 per cent, 

 of chlorine. 



These results lead to the following formula for hydrochlo- 

 rate of thialdine, — 



C,,H,3NS4, HCl, 

 as may be seen from the following comparison between the 

 theoretical and experimental numbers : — 



199-4 100-00 



Nitrate of Thialdine. — This salt may be obtained by mixing 

 this base directly with dilute nitric acid ; it is, however, pre- 

 ferable to dissolve crude thialdine in aether, and agitate the 

 liquid with moderately concentrated nitric acid ; the solution 

 solidities into a crystalline mass, which is washed with OL>ther, 

 dissolved in water, and crystallized by evaporation and cooling. 



Nitrate of thialdine forms fine white needles, more soluble 

 in water than the hydrochlorate ; they are soluble in cold, 

 and more so in hot alcohol, from which liquid they likewise 



