i —— 
BROMACETIC ETHYL ETHER ON SULPHIDE OF METHYL. 619 
It was soon found that these crystals consisted of iodide of trimethyl- 
sulphine. This was proved by a determination of iodine in them after they 
had been purified, and by the characteristic manner in which they crystallised 
from alcohol. 
In order to ascertain the nature of the other products of the reaction, the 
crude, semi-solid product was distilled from a water-bath, and yielded a liquid 
distillate in small quantity, which rapidly solidified to a mass of crystals of 
iodide of trimethyl-sulphine. 
The residue was extracted with perfectly dry ether (in which iodide of 
trimethy]-sulphine is practically insoluble) until it was perfectly colourless, and 
the ethereal extract after filtration was distilled from a water-bath. This left a 
brown oily liquid, which was treated with hyposulphite of soda solution to 
remove free iodine, and then washed with water. Thus purified, it was still 
slightly brown. | 
When boiled with an aqueous solution of caustic baryta, the liquid product 
soon disappeared, showing that it consisted of an ether or of a mixture of 
ethers. 
A considerable quantity of the product was thus saponified with caustic 
baryta, the excess of the latter removed by a stream of carbonic anhydride, 
and the solution filtered off. On evaporating a portion of it to small bulk it 
yielded a gummy mass, which showed no tendency to crystallise. 
The whole of the solution (which had a pink colour) was evaporated some- 
What on a water-bath, and then mixed with alcohol, when it grew turbid and 
deposited a crystalline salt in nodules. This crystalline salt dissolved with 
considerable difficulty on boiling it with water; the resulting solution, when 
allowed to evaporate in a desiccator, yielded crystals presenting the character- 
istic appearance of thiodiglycollate of barium, and which were proved by a 
determination of water and barium to consist of that substance— 
3899 germs. lost at 110° 0907 grms. = 23°3 per cent. 
3899 gave ‘2427 orms. sulphate of baryta = ‘1427 orms. of barium = 366 se, 
Calculated for S(CH,—CO,),Ba ,5H,0 | ave ee 
It should be remarked that the thiodiglycollate was formed in compara- 
tively small quantity. 
The solution from which the thiodiglycollate had been separated was mixed 
with more alcohol, which, however, failed to precipitate any crystalline matter ; 
it was then evaporated to dryness on a water bath, and the barium determined 
im the resulting gummy mass after it had been dried at 110° C.— 
3205 grms. gave ‘2152 sulphate of baryta = 12653 barium = 39-47 per cent. 
“2882 e Ga sf sien ered pe SOOrO0MN ley 
VOL. XXVIII. PART II. 
7 
( 
x 
