370 



Mr. Schorlemmer on the Hydrocarbons 



[May 14, 



Waiiklyn prepared from mannite * also exhibits in its boiling-point and 

 specific gravity a close agreement with the hydrocarbon from suberic acid, 

 and appears to be the same, — 



Boiling-point. Spec. grav. 



C,H^, from suberic acid 69-5 0-6617 at ifo 



„ „ mannite 68-70 0*6645 at 16-5 



J, J, rock-oil 70 0"6651 at 16*5 



2nd group. Hydrocarbons in which one atom of carbon is united with 

 three others, or which contain the group isopropyl. — The members of this 

 section are trimethylformen, amylhydride, ethylbutyl, ethylamyl, and the 

 hydrocarbon Cg H^g which I have prepared from the caprylalcohol, ob- 

 tained from castor oilf. Trimethylformen boils at about —15° C. ; the 

 other members are liquid at common temperature, and show the same dif- 

 ference in their boiling-points as those of the first group, namely 31°. 



Boiling-point. 



t ^ 



Observed. Calculated. 



30^ 30° 



62° 61° 



91° 92° 



Jonvn. Cliem. Soc. N. S. vol. i. p. 233. 

 t This alcohol is, as I have found, a secondary or iso-alcoliol. An account of 1 his in- 

 vestigation, and the reasons wliv T class the hydrocarbon derived from the alcohol in the 

 above group, I shall communicate to the Society shortly. 



Amylhydride, C, H^^ = 



CH3 CH3 



\ / 

 \/ 

 CH 



CH, 



CH3 CH, 

 \ / 



Ethylbutyl, C^ H^^ = CH, 



I 



CH., 



CH3 CH, 



CH 



CH. 



Ethylamyl, . -C-Hj^ = 



CH, 

 CK 



