First determinations of complex formation constants in liquid ammonia solutions using potentiometric titrations: cyano- and thiocyanato-silver(I) complexes at 233 K

Abstract

The first stability constant determinations in liquid ammonia solutions for complexation of Ag⁺ by CN^– and SCN^– are reported, and the anomalous order of the stepwise constants for the formation of AgCN and [Ag(CN)₂]^– is explained: for (CN^–) logK₁= 7.9 ± 0.2, logK₂= 9.1 ± 0.1, logK₃= 1.5 ± 0.4; (SCN^–) log K₁= 0.7 ± 0.3 (mol dm^–3 units).