170 UNIVERSITY OF COLORADO STUDIES 



boiling xylene and then to lead into this solution a stream of dry 

 HCl gas, whereupon the salt is precipitated in the form of micro- 

 scopic yellow needles. The salt contains two molecules of acid. 



Acid Determination. 



.1547 grms. substance after boiling with water required 6.5 c. c. of a 

 .1136 N. Ba(0H)2 solution. 



Computed : Found : 



2HC1=17.34%. 17.42%. 



Hydrobromic Acid Salt. 



The hydrobromic acid salt was prepared in a manner analogous 

 to that of the hydrochloric acid salt. It is also yellow and contains 

 two molecules of acid. 



Acid Determination. 



.2506 grms, substance after boiling with water required 8.6 c. c. of a 

 .1136 N. Ba(OH), solution. 



Computed : Found : 



2HBr=31.61%. 31.58%. 



Picric Acid Salt. 



When an acetic acid solution of picric acid is added to a hot 

 acetic acid solution of the base, the picric acid salt separates out in 

 the form of yellow needles. 



Nitrogen Determination. 

 .2303 grms. substance gave 28.3 c. c. N. at 737 m. m. and 12.5°. 

 Computed: Found: 



C,,H,,N,S„ 2C,H,(N03)30H, 



N=13.89%. 14.11%. 



Methiodide. 



The base was heated with an excess of methyliodide in a sealed 

 tube at 100°. The resulting methiodide was recrystallized from 

 water and obtained in the form of red needles. 



