SE 
ALCOHOL ON HYDROBROMATE OF DIMETHYL-THETINE. 611 
liquids obtained by boiling the crude thetine compound with alcohol are most 
probably mixtures of bromacetic and dibromacetic ether; their odour 
supports this view, as does also the fact that they are readily acted on by 
ammonia. 
The mean results of the determination of carbon and hydrogen in the 
compounds obtained by treating the oily liquids with ammonia, compare as 
follows with the numbers calculated for monobromacet-, dibromacet-, and 
thiodiglycol-amides :— 
Te Il. 
Carbon, , . 5 13:1 33°6 
Hydrogen, , . : 19 6:0 
Calculated for Calculated for Calculated for 
CH,BrCONH,. CHBr,CONH,. S(CH,CONH,),. 
Carbon, s ; 2 17°4 glalcth 32°4 
Hydrogen, : ; : 29 14 | 54 
I am, therefore, inclined to regard those liquids as consisting——the first of 
a mixture of monobromacet- and dibromacet- amides ; the second of thiodigly- 
col-amide. 
In conclusion, I may mention that I have endeavoured, without success, to 
obtain ethers of hydrobromate of dimethyl-thetine, or rather methyl or ethyl— 
bromates of dimethyl-thetine, by the action of methyl or ethyl alcohol on 
hydrobromate of dimethyl-thetine. An attempt to prepare the methyl-bromate 
by passing hydrochloric acid gas through a solution of the hydrobromate of 
dimethyl-thetine in pure methyl alcohol, and allowing the mixture to evaporate 
to dryness, led to the somewhat curious and unexpected result, that the 
bromine of the former was replaced by chlorine, and, therefore, that hydro- 
chlorate of dimethyl-thetine remained. 
An ethyl bromate of dimethyl-thetine has, however, since been obtained by 
the direct addition of bromacetic ether to sulphide of methyl. 
In conclusion, I have to express my thanks to my assistant, Mr W. W. J. 
Nico, and to my pupil, Mr J. E. Baxer, for their assistance in the above 
investigation. 
VOL. XXVIII. PART II. Tea 
