Triphenylarsine hydroxyhalides and their derivatives

Abstract

Triphenylarsine hydroxybromide and hydroxychloride are weak electrolytes in methyl cyanide, the ions produced being Ph₃AsOH⁺ and Hal^–. Conductimetric titrations of these compounds with bromine and iodine chloride respectively indicate that the halogen adducts Ph₃As(OH)Br,Br₂ and Ph₃As(OH)Cl,ICI are strong electrolytes of the form Ph₃AsOH⁺Hal₃^– in methyl cyanide. The adducts have been obtained as solids. The perchlorate and tetrahalogenomercurate(ii) derivatives of the [Ph₃AsOH⁺] ion have been isolated. A bromine adduct of the unusual composition Ph₃As(OH)Br,O·5Br₂ was obtained and for this the structure [Ph₃AsOH⁺]₂Br₃^–Br^– is suggested. Infrared spectra are recorded.