350 Mr. Gervaise Le Bas on the 



The following transformations are also interesting :- 



Acetic Acid. 



CH 8 .CO".0'H. 

 VCH 3 25-9 



CO" 25*9 

 O'H 11-0 



Calc. 62S 

 Obs. 63-8 



Acetic Anhydride. 

 CH 3 CO" 



\ 



CH, CO' 







2 vols. CH 3 . CO OH 125-6 

 less V H,+ Y 0' 14-8 



Calc. 110-8 

 Obs. 110-0 



Ethyl Acetate. 

 CH 3 . CO" . 0'C 2 H 5 . 

 Y CH 3 25-9 

 C0 2 33-0 

 CoH 5 18-0 



Calc. 106-9 

 Obs. 106-1 



Acetyl Chloride. 

 CH, CO" CI 



VCHo 25-9 



CO" 25-9 



CI 22-1 



Calc. 73'9 

 Obs. 74-05 



Ethyl Acetoacetate. 

 CH 3 . CO . CH 2 . CO . OCA, 



Acetyl Group ... V CH 3 . CO" . Cl-Y CI 

 = 74-0-22-1 = 51-9. 



V Ethyl Acetate . . . CH 3 . CO . OCoH 5 less V H 

 = 106-1-3-7 = 102-4. 



V Acetyl Group 



CH, .CO...... 



51-9 



Y Group ... Cfi 2 . CO . OC 2 H 5 ... 102-4 



Calculated voh of Acetoacetic Ester 154*3 



Observed 153'7 (Schiff, 



Ber. xix. p. 560.) 



It is thus concluded that Acetoacetic ester contains the 

 acetyl group (CH 3 . CO" — ), and its constitution is 



CH ; 



CH 5 



\ 



O 



O C, H s 



