152 PROCEEDINGS OF THE AMERICAN ACADEMY. 



shown in the case of Pennsylvania dodecaue, page 141, the portion 

 remaining after incomplete chloriuation is the purified hydrocarbon 



Hendecane, CuH24, 195°~196°. 



Above 173° (760 mm.), fractions collected irregularly and in small 

 amounts to 188°. There was no indication of an accumulation in the 

 vicinity of 180°, but after precipitation of the sulphur compounds with 

 HgClj considerable quantities collected at 188°-192° (730 mm.), which 

 for the most part came together at 189°-19r. An analysis of the crude 

 distillate gave the following percentages of carbon and hydrogen : — 



0.1444 gram of the oil gave 0.2536 gram C0„, and 0.1888 gram H2O. 



Required for CnHjn 



C 85.71 85.67 



H 14.29 14.53 



A specific gravity determination at 20° gave 0.7789, and a determina- 

 tion of its vapor density by the Hofmann method the following value : — 



0.1286 gram of the oil gave 67 c.c. of vapor at 182°, and under 

 357.5 mm. 



Calculated for Cj,H22- Found. 



5.33 5.26 



As in the corresponding crude Pennsylvania distillate, the percentage 

 composition of this hendecane based on the above analysis supports the 

 formula C„H2„, and it is nearly the same as the specific gravity found by 

 Warren, which gave the formula C„U^„ ; it is even closer to the value 

 0.7780, found by Pelouze and Cahours in their distillate from Pennsylva- 

 nia, or rather from American petroleum. Allusion is made in their papers 

 to distillates prepared from Canadian petroleum, as well as from Pennsyl- 

 vania petroleum, and their high specific gravity, much higher than Penn- 

 sylvania distillates yield, would seem to indicate that they had in hand 

 Canadian distillates. Another portion of the crude distillate 189°-190° 

 was agitated with a mixture of nitric and sulphuric acids, and allowed to 

 stand some time after the lieat of the first reaction had moderated. A 

 heavy nitro compound separated, which crystallized on standing. The 

 reaction was far more energetic than in the same distillate from Pennsyl- 

 vania petrolevmi, probably on account of a lartrer proportion of aromatic 

 hydrocarbons. A heavy nitro compound immediately separated as an oil, 

 which crystallized on standing. It was purified by crystallization from 



