1865.] Researches on Ethers. 459 



especially to disentangle their constituent compounds, it is absolutely ne- 

 cessary to operate upon large quantities of material. But if this be done, 

 there is obtained a considerable quantity of the products of the first divi- 

 sion boiling between 204 and 208, whilst the products of the second di- 

 vision boil considerably below these temperatures. 



a. Examination of the products depending upon the duplication of the atom 



of acetic ether. 



Submitted to analysis, this liquid was found to consist of two bodies of 

 the formulae 



C 10 H 18 3 , and C 8 H, O 43 , 



separable from each other by repeated rectification, and also by the action 

 of boiling aqueous potash, which decomposes the second but scarcely affects 

 the first. 



From the results of the analysis, and from considerations which are fully 

 entered into in the paper, we propose for these bodies the following names 

 and formulae : 



Ethylic diethacetone carbonate 



Ethylic ethacetone carbonate . 



or 



Lo C 2 H 5 



The production of ethylic diethacetone carbonate is explained in the fol- 

 lowing equations : 



;H, 

 cr 

 OC 2 H 5 



Acetic ether. 



Ethylic diethacetone 

 carbonate. 



Ethylic diethacetone carbonate is a colourless and somewhat oily liquid, 

 possessing a fragrant odour and a pungent taste. It is insoluble in water, 

 but miscible in all proportions with alcohol and ether. Its specific gravity 

 is '9738 at 20 C. It boils between 210 and 212, and distils unchanged. 



2 M 2 



