328 MESSllS. E. FEANKLAND AND B, F. DUPPA'S 



rCEtMe(OZn"Me) o^rCEtMeHo 



IcOEto ' ICOEto -t-J-v^en-i-AniiOa. 



Ethylic ziucmonomethyl Ethylic ethometh- Zincic 



ethomothoxalatc. oxalate. hydrate. 



A not inconsiderable amount of the ether thus formed in this and in the analogous 

 reactions described above, appears to be decomposed by the zincic hydrate ; at all events 

 an appreciable quantity of the zinc-salt of the derived acid is always obtained from the 

 residue left after distillation of the ethereal product, 



Ethylic ethomethoxalate, as vpe propose to name the new ether, is a colourless, trans- 

 parent and mobile liquid, possessing a penetrating ethereal odour much resembling that 

 of ethylic diethoxalate. It is very soluble in water, alcohol, and ether, and has a specific 

 gravity of '9768 at 13°C. It boils at 165°"5 C. ; and a determination of its vapour- 

 density gave the following results : — 



Weight of ethylic ethomethoxalate "1614 grm. 



Observed volume of vapour 48-52 cub. centims. 



Temperature of bath 188° C. 



Height of barometer 758 millims. 



Difference of heights of mercury inside and outside tube . . 113-5 millims. 

 Height of spermaceti column reduced to millimetres of mercury 15*7 millims. 



Calculated from these data the specific gravity is 4-98, the theoretical number for a 

 two-volume vapour of the above formula being 5-04. 



Ethylic ethomethoxalate is readily decomposed even by aqueous solutions of the 

 alkalies and of baryta, yielding alcohol and a salt of the base. By this means baric 

 ethomethoxalate was prepared. This salt crystallizes from an aqueous solution as a 

 beautiful radiated mass of silky lustre, very easily soluble in water. 



Submitted to analysis it gave the following results : — 



I. -3422 grm. gave -4032 grm. carbonic anhydride and -1611 grm. water. 

 II. *4678 grm. gave on analysis -2932 grm. baric sulphate. 



These numbers agree with the formula 



jCEtMeHo 



CioHi8Ba06,or|^^^Ba", 



(CEtMeHo 

 as seen from the following comparison : — 



Calculated. Found. 



' ' ' ' I. ' n: 



Cio . . 120 32-35 32-13 



Hjg . . 18 4-85 5-23 



Ba . . 137 36-93 36-85 



Og . . 96 25-87 



371 10000 



