ACTION OF THE HALOGENS, ETC. 171 



Iodine Determination. 



.2097 grms. substance gave by the method of Carius .1570 

 grams Ag I. 



Computed: Found: 



C,„H,N,S„ 2CH3I, 



1=40.19%. 40.46%. 



Salts of Thiochinanthrene. 



Nitric Acid Salt. 



The nitric acid salt crystallizes out from a solution of the base 

 in hot concentrated nitric acid. It contains two molecules of water 

 of crystallization. This could not, however, be directly determined, 

 since the salt decomposes between 80° and 100°. By standing in a 

 desiccator the water is not given off. 



Nitrogen Determination. 



.2443 grms. substance gave 29.1 c. c. N. at 734 m. m. and 17°. 

 Computed : Found : 



C„H,N,S„4HNO,,2HA 



N=13.05%. 13.33%. 



Acid Determination. 



.2510 grms. substance after boiling with water required 14.5 c. c. 

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



Compu ted : Found : 



4HNO,=41.44%. 41.35%. 



Sulphuric Acid Salt. 



The salt was obtained in a manner similar to that of paratolu- 

 thiochinanthrene. In this case the salt crystallizes without water in 

 the form of red brown needles. 



