Stabilities of the cyanide complexes of the monovalent group IB metal ions in aqueous solution

Abstract

Potentiometric methods have been used to determine stability constants for the cyanide complexes of Cu(I), Ag(I) and Au(I) in aqueous solution. For Cu(I) the constants determined were log β2 = 21·7, log β3 = 26.8 and log β4 = 27·9, and for Ag(I), log β2 = 20·9 and log β3 = 21·8. For Au(I), E0 for Au(CN)2- was found to be -0·50V, which was combined with a previous estimate of the Au+(aq)/Au(s) standard reduction potential (+1·668V) to give log β2 = 36·6. © 1972.