154 PROCEEDINGS OP THE AMERICAN ACADEMY. 



it collected in very small quantity at lo0°-15o'^. Analysis gave results 

 corresponding to the formula CutLsCl. 



I. 0.2042 gram of the substance gave 0.1548 gram AgCl. 

 11. 0.1938 gram of the oil gave 0.4765 gram 00.7, and 0.2071 gram HoO. 



Found. 

 I. II. 



69.74 

 11.88 

 18.71 



Evidently the chlorination had proceeded so far that the monochlor- 

 liendecane could not be separated completely from the dichlor derivative, 

 as shown by the high boiling point, and the large percentage of carbon. 



The small amount of the dichlor derivative was not sufficient when 

 purified to give satisfactory analytical data in support of its composition. 



DODECANE, C12H26, 214°, 



Above 193° the distillation was continued longer in vacuo. At the 

 end of the eighteenth, between 120° and 130°, 1200 grams collected in 

 single degree fractions, for the most part at 122° -124° and 128° -130°. 



The latter distilled under atmospheric pressure at 212°-214°, and was 

 therefore selected for the study of the hydrocarbon which according to 

 the corresponding distillate in Pennsylvania oil should contain Ci^tLe- 

 The crude distillate gave the following percentages of carbon and 

 hydrogen : — 



Calculated for CijHji. Found 



C 85.51 85.76 



H 14.49 14.55 



The specific gravity of this distillate at 20° was 0.7877. 25 grams 

 of the crude distillate was heated with fuming sulphuric acid to 50°, and 

 kept warm on the steam bath during several hours. Very little sul|)hur- 

 ous acid was set free, although the acid became thick and dark. The loss 

 in weight of the oil was 4.5 grams, or 18 per cent. The remaining oil was 

 washed with sodic hydrate and water, and dried over sodium for analysis. 



0.1500 gram of the oil gave 0.4650 gram COj, and 0.2088 gram 11./). 



