ACETO ACETIC ESTER 



45 



of the existance of the hydroxyl group in both quinon-h}-drodicar- 



CH2 CH2 



I I 



boxvlic ester and acetoacetic ester thus: — COH COH and 



CO2 C2 H5 CO2 C2 H5 



CH3 



COH 



II 

 CH 



CH2 



II 



COH 



CH2 



CO2 C2 H5 CO2 C2 H5. By the action of bromin on acetoacetic ester 

 the mono-, di-, and tri-derivatives only could be formed, therefore it 

 was decided that all compounds seeming to have more than three atoms 

 of bromin are mixtures containing some per-brom- acetoacetic ester, 

 Ce Brio O3, which was formed and which melts at 79°-8o° By heating 

 mono-brom-ethyl-acetoacetic ester ethyl-succino-succinic acid is pro- 

 duced, CH2 CH2 



I I 



, according to the common formula for 



which is CO 



C(C2H5)- 

 CO, H 



I 

 CO 



-C(C2H5) 



CO. H 



CH 



CH 



II 11 



acetoacetic ester or COC2 H.^ COC2 H5, according to the author's 



CH 



CO2H 



CH 

 CO2H 



formula. Acetoacetic ester is decomposed by being heated to 140° with 

 acetic acid. Acetyl chlorid decomposes acetoacetic ester and some 

 carbacetoacetic ester is formed, which shows the presence of hydroxyl 

 in acetoacetic ester with which the acetyl chlorid formed hydrochloric 

 acid which produced the carbacetoacetic ester. Glycolic, oxalic and 

 succinic acids decompose acetoacetic ester into carbon dioxid and 

 acetone. 



