172 Mr. Schorlemmer on the Hydrocarbons [April 6, 



The solution of the sodium salt was evaporated to dryness in the water- 

 bath, the residue distilled with diluted sulphuric acid, and the acid distillate, 

 consisting of an aqueous liquid on which an oily layer swam, was rectified, 

 in order to separate traces of sulphuric acid which had spirted over. The 

 oily acid thus obtained possesses the odour of renanthylic acid, and consists 

 entirely of this compound, as the following analyses of the silver-salt prove. 



(a) The acid derived from the hydride alcohol was neutralized with 

 ammonia, and precipitated with a solution of nitrate of silver. The white 

 flocculent precipitate was washed with cold distilled water, and dried care- 

 fully at 100, when it assumed a greyish colour. 



(1) 0-2084 of this salt gave 0'0948 silver. 



(2) 0-1600 of this salt gave 0'0731 silver. 



(3) 0*1375 of the salt recrystallized from water acidulated with nitric 

 acid gave 0-0620 silver. 



(i) Acid from ethyl-amyl. 



(4) 0-2320 of the silver salt prepared as the salts in analyses 1 and 2 

 gave 0-1065 silver. 



(5) O'l 790 of silver salt obtained by neutralizing the acid with carbonate 

 of silver gave 0-0816 silver. 



Found. 



Calculated for , x , s 



C 7 H l3 Aq0 2 . I. II. III. IV. V. 



45-57 %Aq. 45-49 45-69 45*09 45-73 45-59 

 In the oxidation of both of the alcohols a strong smell of oenanthol is 

 observed. After treating the last distillate with sodium, a small quantity 

 of an oily liquid remained undissolved, possessing the odour of cenanthol, 

 and boiling between 150-160. These liquids gave a crystalline magma 

 by shaking with a concentrated solution of bisulphite of sodium, a few drops 

 of a liquid having a pleasant smell remaining undissolved. 



II. Decatyl Compounds. 



The amyl used in these researches was purified, in order to remove 

 traces of amyl- ether and iodide of amyl, exactly in the same manner as 

 ethyl-amyl. It boiled constantly at 158-1 59, and had the specific gravity 

 0-7275 at 14. The hydride of decatyl was isolated from rectified American 

 petroleum, after purifying the portion boiling between 1 50- 1 70 by a mixture 

 of concentrated nitric and sulphuric acids. It boiled at 1 5 7-l 59, and had 

 the specific gravity 0- 746 1 at 14. Pelouze and Cahours found the boiling- 

 point of this hydrocarbon to be 160, and its specific gravity 0735 at 15. 

 The same hydrocarbon was found by Greville Williams in the oils from 

 Boghead coal, and described as amyl. He gives the boiling-point 159, 

 and the specific gravity 0'7365 at 18. 



Amyl and the decatyl-hydride cannot be distinguished by their odour, 

 which is exactly the same in the case of all the hydrides and the radical 

 hydrocarbons, with the only difference that it is stronger the more volatile 

 the substances are. 





