121 



alcohol molecule has become heavier during the acetylation, and 

 by which the denominator of the above fraction of the alkali quantity 

 must be reduced in order to obtain correct results. By means of this 

 formula the alcohol quantity in the oil mixture corresponding to the 

 acetylation number is obtained, from which, however, the portion 

 appertaining to the diluent must still be deducted. The remainder 

 corresponds to the alcohol quantity which was to be ascertained, and 

 which as value found must then be in proportion to the quantity 

 employed. 



We have made a whole series of tests in order to arrive at 

 Boulez's favourable results; in the first instance we kept strictly to 

 the author's arrangement of tests, but subsequently we have also used 

 other diluents, such as toluene and xylene, and moreover altered the 

 duration of the acetylation. In analogous experiments, corresponding 

 strictly to Boulez's conditions, we have only been able to find back 

 85,5 °/ linalool and 98°/ terpineol; but during these tests we made 

 the astonishing observation that just these corresponding tests Nos. 

 2 and 3 also apparently gave ioo°/ linalool if we calculated the result 

 according to Boulez, i. e. incorrectly. All further details are found 

 in the following tables. These show particularly that a maximum yield 

 of ester is obtained with an acetylation lasting about 7 hours, and 

 that if this period is prolonged, both the linalool and the terpinyl acet- 

 ates appear to be decomposed, a fact which need cause no surprise in 

 view of the labile character of the molecules of these alcohols, and 

 which must rather be regarded as a confirmation of earlier experiments 

 made by us with terpineol, according to which, after submitting undi- 

 luted terpineol for two hours to the action of acetic anhydride, only 

 about 78°/ terpineol were recovered, whilst previously in 3 / 4 hours' 

 acetylation about 85 °/ alcohol had been found. 



1. Turpentine oil. 

 Duration of acetylation: 1 hour 3 hours 



Ester no.: 6,7 6,7 



2. i6,67°/ linalool in turpentine oil. 

 Duration of acetylation: 1 hour 3 hours 



Ester no.: 43,8 53,5 



% c io H i8 0: IO >9 *3>7 



Found per 100 parts alcohol used: 65,4 82,7 



3. 20,00 °/ linalool in turpentine oil. 

 Duration of acetylation: 3 hours 5 hours 



Ester no. : 64,3 69,6 



%C 10 H 18 O: 17,1 18,7 



Found per 100 parts alcohol used: 85,5 93,5 



