132 UNIVERSITY OF COLORADO STUDIES 



NITROGEN DETERMINATION 



0.1936 g. substance gave 36.6 c.c. N. at a temperature of 2 5. 8° and a 

 pressure of 61 2.1 mm. 



C I2 H l6 N 2 - 2 C 6 H 2 (OH) (N0 2 ) 3 



Computed Found 



N= 17.33 P er cent - 17-39 pe r cent - 



CHLOR-PLATINIC ACID SALT 



Platinum chloride precipitated beautiful yellow needles from a hydro- 

 chloric acid solution of the base. 



PLATINUM DETERMINATION 



0.1897 g. substance, dried at ioo°, yielded, on ignition to constant 

 weight, 0.0471 g. platinum. 



(C I2 H l6 N 2 ) 2 -H 2 PtCl 6 



Computed Found 



Pt=24.8 per cent. 24.83 per cent. 



DINITROSO DERIVATIVE 



An ice-cold solution of potassium nitrite was poured with constant 

 stirring into a cold solution of the base in acetic acid. A pale-yellow 

 precipitate formed which soon became red and gummy. This was 

 separated from the solution, pressed out upon a porous plate, and washed 

 with xylene. The red gummy matter dissolved, leaving a yellow sub- 

 stance which, on being recrystallized from ether, proved to be a dini- 

 troso compound. It responded beautifully to Liebermann's Reaction. 

 Melting-point 177 . 



NITROGEN DETERMINATION 



0.1473 g. substance gave 35.35 c.c. N. at a temperature of 18 and a 

 pressure of 614.4 mm - 



C I2 H I4 N 2 ■ (N0) 2 



Computed Found 



N = 22.76 per cent. 22.86 per cent. 



DIBENZOYL DERIVATIVE 



The base dissolved in benzoyl chloride, and the solution immediately 

 solidified to a mass of small lemon-yellow needles. These were filtered 

 off and washed with benzene until they no longer had the odor of ben- 



