122 



4- 16,67% Hnalool fo 



toluene. 





Duration of acetylation: 1 hour 



5 hour 



s (2O°/ linalool) 



Ester no.: 28,5 



55,2 





%C 10 H 18 O: 8,0 



15,8 





Found per 1 00 parts alcohol used : 48,0 



79,o 





5. 16,67 % hnalool in 



xylene. 





Duration of acetylation: 



1 hour 



3 hours 



Ester no. : 



30,8 



46,7 



/ C10 H 18 O : 



8,7 



13,3 



Found per 1 00 parts alcohol used : 



52,1 



79,9 



6. 2O°/ linalool in xylene. 



Duration of acetylation: 3 hours 5 hours 7 hours 12 hours 20 hours 

 Ester no.: 53,3 60,4 63,0 63,3 51,6 



% c io H i8 0: 15,3 17 A 1-8,2 18,3 14,75 



Found per 1 00 parts alcohol used : 76,5 87,0 91,0 91,5 73,8 



7. 2O°/ terpineol in xylene. 



Duration of acetylation: 3 hours 1 ) 4 hours 5 hours 7 hours 12 hours 

 Ester no.: 55,2 67,7 68,8 68,1 65,1 



% c io H i8 0: 15,8 19,6 19,95 19,75 18,8 



Found per 1 00 parts alcohol used : 94,6 98,0 99,8 98,8 94,0 



It is a well-known fact that linalool during boiling with acetic 

 anhydride (or acetic acid), is partly converted in terpineol, geraniol 

 and nerol. Even the use of diluents does not completely arrest this 

 conversion, as was proved when the acetate, obtained after 6 hours' 

 boiling of 2 parts linalool with 3 parts acetic anhydride and 10 parts 

 xylene, was further examined. On fractionating the ester, a fraction 

 with the odour of geranyl acetate could be separated off from the 

 higher-boiling portions, which on saponification yielded geraniol whose 

 diphenyl ur ethane melted at 8o°. 



G. Bruylants 2 ) describes two methods for the determination 

 of essential oils in liqueurs. The one, based upon the capacity 

 of absorbing bromine of the essential oils dissolved in petroleum ether, 

 is employed in the case of liqueurs in which only one essential oil, 

 or several of the same group, are used (anisette, caraway liqueur, 

 Curacao, peppermint liqueur). The other method (by gravimetric analysis) 

 is suitable for liqueurs containing essential oils of different groups 



*) The mixture used for this test contained only 16,67 °/ terpineol. 

 2 ) Ann. de pharm. 12 (1906), 397. 



