24 BIBLIOGRAPHY OF 



and carbon dioxid. Carbopyrotritartaric acid fused with potassium 

 hydroxid gives succinic and acetic acids. The formula assigned to 

 Carbopyrotritartaric acid is CH 3 CO CH CO 2 H 



CH-C=C=H 2 



CO O, and the one, assigned to 

 pyrotritartaric acid is CH 3 

 CO 



CH-CH = C=CH 2 

 C0 2 H 



ZUBLIN, J., 1878. 



Ber. n, 1417-1420; J. Chem. Soc. 34 879; Jsb. Chem. 1878, 811. 

 Azobenzene=acetoacetic Acid. 



This name is proposed for what V. Meyer calls Azo-phenylacetoacetic 

 acid* (Ber. 10, 2075.) CH 3 



CO 



CH-N=N-C 6 H 5 



CO 2 H. The potassium, barium, lead, silver and 



copper salts and ethyl ester are described and also paraazotoluol-aceto- 

 acetic acid, CH 3 CO CH (N 2 C 6 H 4 CH 3 ) CO 2 H, and its ethyl ester. 



*See page 17. 



BANDROWSKI, E., 1879. 



Ber. 12, 344-346 ; J. Chem. Soc. 36, 523 ; Jsb. Chem. 1879, 628. 

 Behavior of Dibromsuccinic Acid with Water. 



At high temperatures water decomposes dibromsuccinic acid by 

 abstracting hydrobromic acid. Two acids are left, one with a boiling 

 point between 129 and 130 which is bromomaleic acid, the other one 

 boils at 172! 



HILQER, A., 1879. 

 Ann. Chem. I95 314-317 ; Ber. 12, 664 ; J. Chem. Soc. 36, 560 ; Jsb. 



Chem. 1879, 1081. 

 Detection of Acetoacetic Ester in Urine. 



Acetoacetic ester was found in the urine of diabetic patients to the 

 amount of .0399 to .1909 in 100 parts. 



