112 PROCEEDINGS OP THE AMERICAN ACADEMY. 



heav3 r polymerized oil. After heating with concentrated hydrobromic 

 acid, the oil was fractioned in vacuo until 15 grams collected at 93 -95 > 

 50mm., corresponding approximately to 180°, atmospheric pressure. 

 The boiling point of the distillate selected is near that of diisopropyl 

 ethylene, 1 16°— 120°, and also that of the octylene, 115°-117°, prepared 

 from octyl chloride by Schorlemmer. 



Analyses of the bromide gave values required for monobromoctane : 

 I. 0.1941 gram of the oil gave 0.3486 gram C0 2 , and 0.1G13 gram H 2 0- 

 II. 0.1885 gram of the oil gave 0.1851 gram AgBr. 



Found. 



n. 



41.83 

 The specific gravity of this octyl bromide was found to be 1.1836. 



NONYLENE. 



The fraction 140°-141°, tenth distillation, atmospheric pressure, was 

 selected for the addition of hydrobromic acid. In fractioning the 

 bromide in vacuo, after the separation of the portion not affected by 

 the acid, the temperature rapidly rose to 110°, and more of the 

 distillate collected at 110'-113° than at any other point in this vicin- 

 ity. This product was less stable than the lower homologues, but its 

 boiling point under atmospheric pressure would probably be in the 

 vicinity of 200°. Upon analysis it gave values required for bromuonane : 



I. 0.1798 gram of the oil gave 0.3481 gram CO,, and 0.1501 gram H 2 0. 

 II. 0.2117 gram of the oil save 0.1888 gram AgBr. 



37.96 



The specific gravity of this bromnonane was 1.2084. 



Higher fractions failed to give us addition products with hydrobromic 

 acid, either because the additive power of the hydrocarbon was too weak, 

 or because if the addition product were formed it was decomposed by 

 distillation in vacuum. The first explanation is probably correct, since 



