580 



Acetic anhydride Number of cc. of 

 content of the mixture N/10 phthalic acid 



7o 



esterified 



Saponification 

 number 



"/o acetyl ated 



according to 



indirect method 



95.0 

 53.6 

 31.2 



15.25 



Acetic acid of 97.2 o/o 



1.6 



1.0 



1.3 



124.3') 

 219.0 

 180.3 

 129.0 



98.0 



67.7 

 13.4 

 19.8 

 28.4 

 38.6 



Altogether the following amounts of citroiiellal were therefore 

 acetyl ated. 



37.7 -f- 74.6 = 112.3 



72.0 + 16.0= 88.0 

 57.3-1-22.9= 80.2 

 39.2 -i- 31.6= 70.8 



29.1 -1-41.6= 70.7 



95.0 7. 

 53.6 

 31.2 

 15.25 



Acetic acid of 97.2 '/, 



The original use of 95 7o anhydride therefore leads to partial 

 formation of a diacetate, while the other acetic anhydride mixtures 

 do not yield 100 "/„, which would indicate that these cause, in 

 addition, the formation of hydrocarbons terpenes. 

 • The presence of geraniol, like that of acetic acid, leads to a better 

 eslerification of the citronellal, as was the case in the estimations with 

 phthalic anhydride. 



While according to the indirect method with acetic anhydride of 

 95 7^, in two hours only 30.2 7o ^^ citronnellal was esterified, 

 mixtures with geraniol gave the following result: 



Quantity Quantity of Quantity 



of geraniol citronellal i esterified 



grm. grm. grm. 



Assuming that in the mixture 98.5 7o ^^ the geraniol is esteritied, 



^) This higher figure is most probably due to increased absorption of water, 

 when working on a large scale. 



