SYNTHETICAL EESEAECHES ON ETHEBS. 



41 



From considerations which are fully entered into below, we propose for this body the 

 name ethylic diethacetone carbonate. The formation c ^' this compound is explained in 

 the following equations : — 







2CJo 



IOC2H5 



Acetic ether. 



C4 



o 



IOC2H5 



o 



0_ 



Na^ +2C2H5l=C4J (C2H5)24-2NaI 

 O 

 IOC2H5 



o 



IOC2H5 



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 pro- 

 portions with alcohol or ether. Its specific gravity is -9738 at 20° C. It boils between 

 210° and 212°, and distils unchanged. The density of its vapour was calculated from the 

 following numbers to be 6"59. 



Weight of liquid -1978 grm. 



Observed volume of vapour 46'01 cub. centims. 



Temperature of bath 232° C. 



Height of barometer 767 millims. 



Difference of heights of mercury inside and outside tube . . 76'5 millims. 



Height of spermaceti column reduced to millims. of mercury 15-1 millims. 



The above formula, corresponding to two volumes, requires the number 6-43. 



Boiling aqueous solutions of potash and soda have scarcely any action on ethylic die- 

 thacetone carbonate, but baryta-water and lime-water decompose it vdth great facility, 

 as do also boiling alcoholic solutions of potash and soda. In all these cases a carbonate 

 of the base is precipitated, whilst alcohol and a light ethereal liquid are produced. 



This liquid, freed from alcohol by repeated washing with salt and water, boiled, after 

 drying over calcium chloride, between 137°-5 and 139° C. Submitted to analysis, it 

 yielded the following results : 



•2075 grm. gave -5594 grm. carbonic acid and -2313 grm. water. 

 These numbers agree with the formula 



C7 Hi4 O, 

 as seen from the following comparison : 



