260 PROCEEDINGS OF THE AMERICAN ACADEMY. 



OCTONAPHTENE, CgHig. 



After the tweutieth distillation, 30 grms. collected at 118°-120°, 

 which, with no further purification than drying over sodium, gave 0.7615 

 as its specific gravity at 20°, and, on analysis, values required for 

 octonaphtene : — 



0.1457 grm. of the oil gave 0.4566 grm. COo and 0.1922 grra. HoO. 



C 85.47 



H 14.71 



After thorough treatment with fuming sulphuric acid the specific 

 gravity was reduced to 0.7532, at 20° (octonajihtene, 0.7582 at 17". 5, 

 Beilstein and Kurbatoff), but the composition was scarcely changed : — 



I. 0.1471 grm. of the oil gave 0.4618 grm. COo and 0.1895 grm. H.,0. 

 ir. 0.1334 grm. of the oil gave 0.4185 grm. CO. and 0.1762 grm. PLO. 



After the eighteenth distillation, 25 grms. remained persistently at 

 124°-125°, which was not affected by fuming sulphuric acid in the cold, 

 but at 100° the acid became colored and gave off much SO^. On pour- 

 ing into water, the solution gave a peculiar odor resembling turpentine, 

 and a black powder separated that contained nitrogen. Analysis of the 

 distillate after the treatment with the acid gave values required for 



0.1391 grm. of the oil gave 0.4354 grm. CO2 and 0.1875 grm. HoO. 



Required for CnHsn. Found. 



C 85.70 85.36 



H 14.30 14.98 



Since no other hydrocarbon than normal octane has been recognized 

 with this boiling point, this distillate must be a mixture of octonaphtene 

 with a higher body, but evidently normal octane is not present in ajipre- 

 ciable quantity. 



NONONAPHTENE, CgHig. 



A considerable quantity of distillate collected at 134°-135°, that gave 

 as its specific gravity 0.8175. After purification with fuming sulphuric 



