138 PROCEEDINGS OP THE AMERICAN ACADEMY. 



collected at 196°-200° absorbed chlorine at a gentle heat with the for- 

 mation of a raonochlor derivative that boiled at 242°-245° with a specific 

 gravity of 0.9330 at 22°. These values are much in excess of the deter- 

 minations given above. Our boiling point under atmospheric pressure 

 was only approximate, since the chlorine product was considerably decom- 

 posed at those temperatures. In the action of chlorine, the substitution 

 proceeded with the greatest readiness as soon as the chlorine came in 

 contact with the hyrlrocarbon. No heat was necessary, although, if the 

 action proceeded rapidly, much heat was developed. 



The composition of the product obtained by Pelouze and Cahours 

 corresponds to the formula C12H25CI, as shown by the following record 

 of their analyses : — 



Calculated for CjjHjsCl. Found 



C 70.41 70.34 



H 12.23 12.37 



CI 17.36 17.53 



In further support of the formula CnHogCl, Mr. Hudson made a 

 determination of the molecular weight of the chloride by the Beckmann 

 method, using benzol as a solvent, in which he obtained 191 ; the formula 

 C11H20CI requires 190. 



Evidently a dichlorhendecane was also formed in this chlorination, 

 since in the vacuum distillation, about 5 c.c. collected at 190° -200°, that 

 gave a percentage of chlorine two per cent too low for the required value. 

 But the quantity was too small to purify it sufficiently to give acceptable 

 results. 



DODECANE, C12H26, 21 4° -21 6°. 



Above 193°, 730 mm., the fractions were very small to 208°, but 

 between 208° and 210° much larger quantities collected, for the most 

 part at 209° to 210°. Without further purification except drying with 

 sodium, the crude distillate was analyzed : — 



0.1392 gram of the oil gave 0.4355 gram CO2, and 0.1845 gram HgO. 



A determination of its specific gravity gave 0.7745. After treatment 

 with concentrated sulphuric acid, the specific gravity was not changed, — 

 0.7744. Another portion of the crude distillate was shaken with nitric 



