ACTION OF THE HALOGENS, ETC. 181 



I*^itrogen Detenu ination. 



.2H01 grms. substance gave 9.3 c. c, N. at 730 m. in. and 21°. 



Computed : Found : 



N=3.54%. 3.90^,. 



Platinum Double Salt, 



After adding platinum chloride to the HCl solution of the base, 

 yellow crystals of the platinum double salt crystallize out. 



Platinum Determination. 



.ISTH grms. substance gave .0253 grms. platinum. 



Computed: Found: 



(C,H,NI,),H,PtCl„ 



Pt=16.24%. 16.05%. 



NiTEO - lODO - PARATOLUQUINOLINE. 



Five grams di-iodo-paratoluquinoline were heated with an excess 

 of fuming nitric acid for two hours. On pouring the resulting 

 solution into water a precipitate of nitro-iodo-paratoluquinoline forms, 

 which crystallizes in yellow needles from acetic acid. Melting 

 point 133°. 



Iodine Determination. 



.1374 grms. substance gave .1034 grms. Agl. 

 Computed: Found: 



C,oH,NINO„ 

 1=40.44%. 40.69%. 



In the preceding investigations it has been made clear that the 

 formerly accepted formulas for thiochinanthrene, its isomer, and its 

 homologues must be changed in such a manner that they shall include 

 tetravalent and not divalent sulphur as heretofore supposed. The 

 valences are satisfied in that the sulphur atoms are bound together 



