166 PROCEEDINGS OF THE AMERICAN ACADEMY. 



The low values are due to a small amount of clilorine that was not 

 entirely removed even by the treatment with sodium : — 



0.1558 gram of the oil gave 0.4803 gram CO2, and 0.2115 gram HgO. 



In the formation of chlorine derivatives from the purified fraction 196°, 

 Canadian petroleum, 25 grams absorbed 7 grams chlorine. After five 

 distillations in vacuo, 3 c.c. collected at 145°-150°, which distilled at 

 220°-228° atmospheric pressure, and by analysis gave values required 

 for CnHaiCl : — 



I. 0.2378 gram of the substance gave 0.1747 gram AgCl. 

 II. 0.2005 gram of the oil gave 0.5105 gram COo, and 0.2097 gram 

 H2O. 



Calculated for Found. 



Ci,[l23Cl. I. II. 



C 70.03 69.44 



H 11.14 11.62 



CI 18.83 18.18 



A determination of the specific gravity of the raonochloride at 20° 

 gave 0.8882. With the small quantity of the higher distillates, it was 

 not possible to separate a dichlor derivative in any degree of purity. 



The small amount of the monochloride evidently precluded the possi- 

 bility of ascertaining with any precision the true boiling point, and the 

 analysis is chiefly of value in determining the number of carbon atoms 

 in the molecule. The number of carbon atoms received still further 

 confirmation in a determination of the molecular weight by the Beckman 

 method, which gave 187 ; the formula CuHojCl requires 188.5. 



Hydrocarbon, C12H24. 



Above 195° (730 mm.) the distillates were small in quantity to 208'', 

 but between 208° and 212° about 300 grams collected, for the most part 

 at 208°-210°. The specific gravity of the crude distillate was found to 

 be 0.7947, and analysis gave the following percentages of carbon and 

 hydrogen : — 



0.1554 gram of the oil gave 0.4878 gram CO.., and 0.1982 gram HoO. 



