576 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Monochlorheptadecane, C17H35CI. — The chlorine product from hepta- 

 decane collected in considerable quantity at 175°-177°, 15 mm. Its 

 specific gravity at 20° was found to be 0.8962. The percentage of 

 chlorine corresponded to the monochloride : — 



0.1510 grm. of the oil gave 0.0807 grm. AgCl. 



Calculated for CJ7H35CI. Found. 



CI 12.92 13.21 



On cooling a portion of the distillate I88°-189° to —10°, it formed a 

 pasty mass from vrhich a small amount of a crystalline solid was ob- 

 tained by filtration. The solid after crystallization from ether and 

 alcohol melted at approximately 10°. The amount of solid was not 

 sufficient for purification or examination. The filtered oil gave as its 

 specific gravity at 20°, 0.8035, slightly higher than the distillate before 

 filtration. Since the original distillate showed the composition of the 

 series, GJ^2n+2^ it did not seem worth while to make any further exami- 

 nation of the filtered oil. 



OCTODECANE, CigH 



38 • 



After the twenty-sixth distillation larger quantities of distillates col- 

 lected between 198° and 204°, mostly at 199°-200° (50 mm). The dis- 

 tillate l99°-200° distilled for the most part, although with considerable 

 colored residue and bad odor, at 300°-301°, under 760 mm. After dry- 

 ing over sodium its specific gravity was 0.8054, after agitation with 

 sulphuric acid, 0.8035, and after purification with fuming sulphuric acid, 

 0.8017, at 20°. 



Its molecular weight was ascertained by the Beckman method at the 

 freezing point. 



I. 0.9963 grm. of the oil and 36.4129 grms. benzol gave a depression 

 of 0°.53. 

 II. 0. 9926 grm. of the oil and 23.2544 grms. benzol gave a depression 

 of 0°.84. 



Calculated for Found. 



254 252.7 254.2 



Combustion I. was made of the unpurified distillate dried over so- 

 dium ; combustion II., of the oil after purification with concentrated sul- 



