176 UNIVERSITY OB^ COLORADO STUDIKS 



Acid Determination in the HBr Salt obtained by heating the Bro- 

 mine Product to Constant Weight. 

 .1726 grms. substance after boiling with water required 0.75 c. c. 

 of a .1136 N. Ba(0H)3 solution. 



Computed : Found : 



C.^H^N^S,, 2HBr, 

 2HBr=33.61%. 33.82%. 



[c). From Base from Orthotoluquinoline. 



As in the two other cases, a red crystalline unstable bromine 

 product was obtained. By heating it at 100° the original red 

 changes gradually to quite another red color, which exactly corre- 

 sponds to the color of the HBr salt. Tlie decomposition proceeds 

 until the free base is obtained. A bromine determination showed 

 more than five bromine atoms to the molecule. 



Bromine Determination. 



.1593 grms. substance gave .2207 grms. Ag Br. 



Computed : Found : 



Cj^H^N^S^, 2HBr, Br„ 

 6HBr=67.6%. 58.96%. 



5HBr=55.7%. 



B. 



Action of SClj on Paratoluquinoline. 



Twenty grms. of paratoluquinoline were mixed with thirty grms. 

 of SCI2, the flask being at the same time cooled with ice. After 

 heating the mixture five hours at 120° upon the oil bath, the serai - 

 liquid product was successively treated with concentrated HCl as 

 long as a brown coloration showed in the solutions. The solution was 

 then heated with animal charcoal and filtered through cotton, where- 

 upon the HCl salt of the sulphur base crystallized out. This was 

 purified as in A. 



The filtrate from the HCl salt was then distilled with super- 

 heated steam. A mixture of two chlorine substituted paratoluquino- 



