Complex Derivatives of Ammonia and Aurous Halides

Liquid ammonia reacts with aurous chloride to form compounds AuCl,3NH₃ and AuCl,12NH₃; at 18° C. gaseous ammonia and aurous bromide give a white powder, AuBr,2NH₃. Liquid ammonia converts aurous iodide into a compound AuI,6NH₃, from which ammonia is eliminated by rise of temperature, the substance being completely transformed at 20° C. into AuI,NH₃, a compound also formed by the action of ammonia-gas on aurous iodide.