[maass-russell] 



OXONIUM COMPOUND 

 Table I 



261 



As a check the curve was repeated. The ether hydrobromic acid 

 mixture this time was not quite identical with that previously used, 

 the melting point being — 39-5°C. instead of — 40-5°C. The results 

 obtained in this series are shown in Table II. 



Table II 



It can be seen from the diagram that in both curves I and II, 

 representing Tables I and II respectively, there is a well-defined 

 maximum between 10 and 11 per cent, which corresponds with the 

 monohydrate of ether hydrobromide, which would have the com- 

 position 10-4 per cent water. Thus it has been shown that here, too, 

 solubility is accompanied by compound formation. 



An attempt was made to determine the freezing point curve of 

 the system ether-hydrobromide-ethyl alcohol, but the viscosity 

 of the resulting solutions made it impossible to proceed more than a 

 very short distance along the curve. The values obtained are given 

 in Table III, plotted in Curve III of the diagram. 



