180 L'XlVEUSriY OF COLORADO STUDIES 



Bromine Determination, 



.1569 grms. substance gave .1947 grnis. AgBr. 



Computed : Found : 



C,H,NBr„ 

 Br-:53.15%. 52.81%. 



Platinum Double Salt. 



Platinum chloride precipitates the crystalline double salt from 

 the HCI solution of the base. 



Platinum Determination. 



.1761 grms. substance, dried at 100°, gave by ignition .0840 grms. 

 platinum. 



Computed : Found : 



( C,„H,NBr,),H,PtCl«, 



Pt==19.27%. 19.31%. 



E. 



A("rioN OF Iodine upon Pakatoluqcinoline in the Pkksknok of 

 Fuming Sulphuric Acid. 



Twenty grams of powdered iodine were mixed with ten grams of 

 paratoluquinoliue sulphate. The mixture was then added in small 

 quantities to fifty grams of fuming sulphuric acid. After live hours 

 heating on the water bath, the resulting product was poured into 

 ice cold sulphurous acid. The impure yellow product thus obtained 

 was "filtered, washed with hot water until the yellow color had dis- 

 appeared, and recrystallized from alcohol. The di-iodoparatoluquin- 

 oline thus obtained forms silky white needles, which melt at 135° 

 — 136'\ Yield 72%. 



Iodine Determination. 



.1562 grms. substance gave .1858 grms. Agl. 



Computed : Found : 



C,„H,N1,, 



1=64.05%. 64.27%. 



