462 Messrs. Frankland and Duppa Synthetical [Nov. 16, 



3 t C H 3 



O" _ r JP^_ _ JCEtH 2 

 H C 'C a H.- \CMeO 



Its relations to acetone and diethylated acetone are then clearly seen in 

 the following formula, 



/CH 3 JCEtH 2 JCEt 2 H 



\CMeO \CMeO \CMeO 



Acetone. Ethylated Diethylated 



acetone. acetone. 



Ethylated acetone is a colourless, transparent and very mobile liquid, 

 possessing a powerful and pleasant odour, in which that of camphor is 

 slightly perceptible. Its specific gravity is '8132 at 13 C., and '8046 at 

 22 C. It boils steadily at 101-5, and its vapour has the density 2-951, 

 the above formula requiring 2*971. Ethylated acetone neither absorbs 

 oxygen from the air, nor reduces ammoniacal solutions of silver. It yields 

 with concentrated solutions of bisulphite of soda a compound in large and 

 brilliant crystals, which are quite permanent in the air, and which at once 

 distingush it from diethylated acetone, the latter producing under the same 

 circumstances an oily compound. Ethylated acetone is not altered by pro- 

 longed ebullition with alcoholic potash. 



j3. Examination of the products derived from the replacement of hydro- 



gen in the methyl of acetic ether by ethyl. 



The chief results of this examination are given in the note above alluded 

 to *, and we have only to add that ethacetic acid is identical with butyric 

 acid, whilst diethacetic acid is isomeric with caproic acid. 



II. Action of Sodium and Methylic Iodide upon Acetic Ether. 



This reaction is conducted in substantially the same manner as that 

 above described, and the products are completely homologous. Thus 

 there are produced two carboketonic ethers, and an ether derived from 

 acetic ether by the substitution of methyl for hydrogen. The latter has 

 been already described in our previous communication on this subject. 



The following are the names and formulae of the carboketonic ethers : 



(9 



Ethylic dimethacetone carbonate . . C 4 <( / 



OC 2 H 5 

 H, 



O" 



p CT 



Ethylic methacetone carbonate . . C t J -- 



lo 77 "" 

 Lqc.H, 



* Proceedings of Eoyal Society, vol. xiy. p. 198. 



