OF ARTS AND SCIENCES. 103 



Potassic chlorbromiodacrylate KC3ClBrI0,^ ? 



The potassium salt is obtained as a very deliquescent solid mass by 

 evaporating a solution of the acid after neutralizing with potassic 

 carbonate. 



0.807 G grm. of the salt dried at 80° gave on ignition with IlgSO^ 

 0.217Ggrm. K^SO,. 



Calculated for KCsClBrlOi . Found. 



K 11.19 11.27 



Argentic chlorbromiodacrylate AgCoClBrlOj . 



The silver salt was prepared by the addition of argentic nitrate to a 

 hot aqueous solution of the acid. It crystallizes in rhombic prisms, 

 which are quite soluble in hot, sjmringly soluble in cold water. 



I. 0.5383 grm. of the salt gave 0.1825 grm. AgCl. 

 II. 0.5129 grm. of the salt gave 0.1766 grm. AgCI. 



Calculated for AgCaClBrlO.^ . Found. 



I. II. 



Ag 25.80 25.52 25.91 



PRELIMINARY NOTICE ON ORTHOIODBENZYLBROMIDE AND 

 ITS DERIVATIVES.* 



Charles F. Mabery and Franklin C. Robinson. 



Orthoiodbenzylbromide is formed when bromine is allowed to act on 

 orthoiodtoluol at temperatures near its boiling point. In the prepara- 

 tion of orthoiodtoluol we obtained the most satisfactory results from the 

 sulphate of orthodiazotoluol. Orthotoluidin from the factory of Kahl- 

 baum at Berlin was treated in quantities of 10 grms. each with two 

 molecules of sulphuric acid, and to this mixture, kept cold with snow, 

 was added gradually a solution of one molecule of sodic nitrite. On 

 the addition of hydriodic acid (boiling point 127°) in slight excess 

 over the calculated amount for the solution of the diazo-compound 

 thus obtained, orthoiodtoluol was precipated as a heavy oily liquid. 



* Since Professor Jackson decided not to include orthoiodbenzylbromide in 

 his researclies on the substituted benzyl compounds, we have undertaken its 

 study. (C. F. M.) 



