SYNTHETICAL EESEAECHES ON ETHEES. 



49 



The second portion of the product /3, mentioned above as a liquid boiling at 151° C, 

 was next submitted to analysis. 



I. '2276 grm. gave •5523 grm. carbonic acid and -2279 grm, water. 

 II. '1839 grm. gave "4461 grm. carbonic acid and "1847 grm. water. 



These results correspond with the formula of diethacetic ether. 



Co 



H 



O 

 OC^H, 



as is seen from the following comparison : — 



Calculated. 

 A 



H 



16 



96 

 16 

 32 



144 



66'66 

 11-11 



22-23 



I. 



66-18 



11-13 



Found. 



A 



II. 



66-16 

 11-16 



100-00 

 Diethacetic ether is derived from acetic ether by the following reactions : — 



'Na^ 



+Na2=C2^ 



cJo 



loC^H, 



H 



O 



+H2 



pv 



Acetic ether. 



~vr 



Disodacetic ether. 



c. 



I Na^ 

 H 

 O 



+2C2H5l=C2- 



IOC2H5 



(C2 115)2 



H 

 O 

 OC2H5 



-+2NaI 



V 



Diethacetic ether. 



Disodacetic ether. 



Diethacetic ether is a colourless and transparent liquid of a peculiar and fragi-ant 

 odour, and a taste somewhat like peppermint. Its specific gravity is -8822 at 0° C. It 

 is insoluble in water, but miscible in all proportions with alcohol and ether. It boils 

 constantly at 151° C, and its vapour has, theoretically, the density 4-98. Experimen- 

 tally the number 5-00 was obtained from the following data: — ■ 



Weight of diethacetic ether "1697 grm. 



Observed volume of vapour 48*23 cub. centims. 



Temperature of bath 168° C. 



Height of barometer 758 millims. 



Difference of heights of mercury inside and outside tube . . 109 millims. 



Height of spermaceti column reduced to millims. of mercury 15-7 millims. 



