466 Mr. Schorlemmer on the Hydrocarbons [Nov. 16, 



The quantity which I obtained was only sufficient for determining the 

 boiling-point and the specific gravity, both of which nearly coincide with 

 those of ethyl-amyl ; and although I could not investigate its reactions, I 

 believe that these also will agree with those of ethyl-amyl, so that the two 

 hydrocarbons appear to be identical. 



(2) Hydride of Heptyl from Azelaic Acid. By C. SCHORLEMMER and 



R. S. DALE, B.A. 



One of us has shown that by heating a mixture of azelaic acid and 

 caustic baryta to a dull red heat, an aromatic liquid is obtained, which 

 chiefly consists of the hydrocarbon C 7 H 16 . By oxidizing castor-oil with 

 nitric acid on a large scale, one pound of pure azelaic acid was prepared, 

 which yielded about one ounce of a hydrocarbon boiling between 95 and 

 100. Subjected to fractional distillation, a small quantity of hydride of 

 hexyl from the suberic acid, which still adhered to the azelaic acid, was 

 separated, and now the liquid boiled constantly at 100'5 C. (corrected). 

 The sp. gr. at 20'5 C. was found to be 0'6640. 



The determination of its vapour-density gave the following results : 

 Balloon + air .................. 7'5660 



Temperature of air .............. 16-5 



Balloon and vapour .............. 7'7830 



Temperature on sealing .......... 140 



Capacity of balloon .............. 1 15'5 cub. centims. 



Vapour density calculated. Found. 



3-46 3-63 



This hydrocarbon is very easily attacked by chlorine, the chloride 

 C 7 H 15 Cl being chiefly formed, together with a small quantity of higher 

 chlorinated products. 



The chloride boils at 151-lo3 C., and has the specific gravity 0'8/37 

 at 18'5. It is a colourless liquid, smelling exactly like the chloride ob- 

 tained from ethyl-amyl. 



0-3045 substance gave 0'3165 chloride of silver and 0'0045 of metallic 



silver. 



Calculated. Found. 



26-40 per cent. Cl 26*20 per cent Cl 



By heating this chloride with acetic acid and acetate of potassium in 

 sealed tubes, heptylene and acetate of heptyl are formed. This decompo- 

 sition goes on much quicker than in the case of the chloride from ethyl- 

 amyl ; and the proportions of the substances formed also differ, as only a 

 very small quantity of heptylene is produced, and the chief product con- 

 sists of the acetate, whilst the chlorides from ethyl-amyl and from petro- 

 leum yield these two substances in about equal quantities. 



The heptylene boils at 95-97, and has the specific gravity 07026 at 



The faint garlic-like smell is identical with that of the heptylene de- 

 scribed in my last paper. 



