DIETHYLSUCCINOSUCCINATE 



(ETHYLDIOXYDIHYDROTERAPHTHALATE) : 



A STUDY OF ITS CONSTITUTION, SOME DERIVATIVES, AND 



ABSORPTION SPECTRA ^ 



By H. D. GIBBS and H. C. Brill 



(From the Laboratory of Organic Chemistry, Bureau of Science, 



Manila, P. I.) 



THREE TEXT FIGURES 



Fehling ^ first produced dimethylsuccinosuccinate in the course 

 of his studies on the action of alkali metals upon methysuccinate. 

 The work of F. Herrmann ^ added greatly to the knowledge of 

 the structure of this compound. He gives formulas to show its 

 relation to phthalic acid in the sense of the formula 







II H ■ 



Ha^N-^COOEt 



H 



. I^COOEt 



II H 

 



and for the sodium salt he gives the formula 







II Na 



H2(^'-C00Et 



Hal^^'— COOEt 



ilNa 

 



in both of which the carboxyl groups are in the ortho position. 



Diiisberg * pointed out the fact that neither the above formula 

 nor the formula in which the carboxyl groups are in the para 

 position was proven. 



The work of Geuther,' Wedel,** and Ebert ' also contributed 



* Received for publication August 18, 1914. 



''Ann. d. chem. (1844), 49, 192. 



'Ann. d. chem. (Liebig) (1882), 211, 306. 



'Ber. d. deutschen chem. Ges. (1883), 16, 138. 



' Ann. d. chem. (1883), 219, 119. 



•Ibid. (1883), 219, 71. 



'Ibid. (1885), 229, 45. 



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