4 BIBLIOGRAPHY OF 



at 177.4 an d has a specific gravity of 1.020 at 9 Methylen-di- 

 metrylen carboxylic acid ethylen treated with ammonia gives two com- 

 pounds ; C 7 H I3 NO 2) which is insoluble in water, andC 5 H 9 NO 2 , which 

 is soluble in water. When the above esters are distilled some dehydra- 

 cetic acid Cg Hg O 4 is formed as a solid in the flask. 



Geuther appends a note to this article in which he gives his opinion 

 as to the constitution of dehydracetic acid. He supposes it to be acetic 

 acid in which two hydrogen atoms have been replaced by acryl, C 3 H 3 

 O, thus : C H (C 3 H 3 O) 2 CO 2 H. 



FRANKLAND, E., AND B. F. DUPPA, 1867. 



J. Chem. Soc. 20, 102-116; Ann. Chem. 145. 78-93 ; Jsb. Chem. 1867, 



394- 

 Synthetical Researches on Esters. Part II. 



By the action of sodium and then isopropyl iodid on acetic ester, 

 monoisopropyl acetoacetic ester was produced, it is insoluble in water, 

 miscible with ether and alcohol, has a specific gravity of .9804, boils at 

 201 with 758.4 m. m. pressure and distils unchanged. When saponified 

 isopropyl acetone, CH 3 CO CH 2 CH ( CH 3 ) 2 , is produced, it is sparingly 

 soluble in water, miscible with alcohol and ether, boils at 114 with 

 758.4 m. m. pressure and has a specific gravity of .8189 at o. 



The difference is shown between it and two isomers, methyl valeral 

 and ethyl butyral. 



GEUTHER, A., 1869. 



Ztschr. *Chem. 5, 27 ; Bull. Soc. chim. 12, 377. 

 Changing Acetoacetic Ester into Ethylacetic Ester. 



Acetoacetic ester heated to 1 20 with sodethoxid and acetic ester is 

 changed into ethyl acetic acid, CH 2 C 2 H 5 CO 2 H. 

 ^Original article not consulted. 



WANKLYN, A., 1869. 



Ann. Chem. 149, 43-49 ; Jsb. Chem. 1868, 509. 

 Research upon Esters. 



The action of sodium in sealed tubes upon a number of esters was 

 investigated and in no case was hydrogen evolved. The esters thus 

 worked with were acetic ester ; acetic allyl ester ; butyric ester ; valeric 

 ester and benzoic ester. The equation for sodium and acetic ester was 

 given as follows : 



