290 PROCEEDINGS OF THE AMERICAN ACADEMY. 



The molecular weight was also ascertained at the freezing point. 



0.8672 grm. of the oil and 25.03 grms. benzol gave a depression of 

 1°.090. 



Calculated for C9H17CI. Found. 



160.5 - 156 



In further support of the formula of the chloride, the index of refrac- 

 tion was determined, 1.462, and the molecular refraction calculated. 



Calculated for CgHjjCl. Found. 



46.3 47 



When sodium was allowed to act on trimethylhexamethylene chloride, 

 a vigorous reaction set in that could be controlled by cooling. By carry- 

 ing on the reaction in an ethereal solution, on standing over night in 

 water the reaction was complete. The product of the reaction consisted 

 for the most part of an unsaturated hydrocarbon, and a smaller quantity 

 of a heavy oil, doubtless formed by the union of two methylene rings. 

 The boiling point of the unsaturated hydrocarbon was 135°-140°. Its 

 unsaturated condition was shown by the readiness with which it united 

 with iodine in Hiibl's reagent, absorbing approximately two atoms of 

 iodine. The specific gravity of the unsaturated hydrocarbon at 20° was 

 0.7762. The molecular weight at the freezing point was determined. 



0.8572 grm. of the oil and 22.45 grms. benzol gave a depression of 1°.571. 



Calculated for CgHjg. Found. 



124 120 



The index of refraction was found to be 1.431, and the molecular 

 refraction : — 



Calculated for TrnnTid 



C^K,(ms)3. CeH8(CH3)2=CH2. '°''°''- 



39.26 40.97 41.46 



Dekanaphtene Chloride, C10H19CI. 



In confirmation of the formula of dekanaphtene, the index of refraction 

 was determined and the molecular refraction calculated. With the den- 

 sity 0.7898, and the index 1.4325, the molefular weight gave the 

 following value: — 



Calculated for CmHjo. Found. 



46.10 46.00 



