BY CHIPMAN AND MCINTOSH 195 



sealing up some antimony trichloride with liquid hydrogen 

 in a tube and leaving them for some time. They state 

 that the salt was readily soluble and remained as a clear 

 solution, but that on evaporation or cooling a yellow solid 

 separ,ited which they suspected to be a mixture of antimony 

 sulphochloride, SbSCl, and antimony trisulphide. It was 

 noticed that all the chloride did not dissolve, but on the addition 

 of a further amount the conduction increased. On filtering 

 the solution and analysing it, approximately seventy-five per 

 cent, was found to dissolve. 



To obtain evidence of a chemical reaction a solution of the 

 trichloride in hydrogen sulphide was allowed to evaporate, and 

 the gas was passed through water. Hydrogen chloride was 

 found in the distillate, showing that the sulphide and chloride 

 had reacted. We hope in the future to examine this reaction 

 more fully, and to make molecular weight determinations of 

 the substances mentioned in this paper by the freezing — and 

 boiling-point methods. 



Summary 



1. An apparatus has been constructed to measure the 

 conductivity of substances in liquid hydrogen sulphide, and a 

 satisfactory method of stirring the solution has been devised. 



2. The conductivity of fifteen substances in liquid hydro- 

 gen sulphide has been examined. Of the substances investigat- 

 ed, iodine, tri-isobutylamine, tri-propylamine, and antimony 

 trichloride were found to possess an appreciable conductivity 

 which was measured over a considerable concentration range. 



3. It was found that all of these substances acted as if they 

 formed complex compounds with the solvent, with the excep- 

 tion of iodine, which conducted the current in a similar manner 

 to an electrolyte in aqueous solutions. 



4. It is concluded that the conductivity of the solutions 

 of the amines and antimony trichloride is due to the dissociation 

 of a compound formed with the hydrogen sulphide, while in the 

 case of the iodine it is due to the dissociation of the iodine into 

 positive and negative ions. 



